Let's Encrypt
Let's Encrypt Application
The following page provides details on domains, networks, IPs, hosting services, and content delivery networks used by Let's Encrypt.
Description
Let’s Encrypt is a free, automated, and open certificate authority brought to you by the non-profit Internet Security Research Group (ISRG).
| Category | Cybersecurity |
| Web Link | Let's Encrypt - Home Page |
Application Domains
The application domains data shown here is available in our Netify Data Feeds solution. The data is accessible via our IP API as well as downloadable datasets.
Domains
Primary Domains
Primary Domains are owned and managed by the application vendor.
Platform Domains are often provided by hosting providers, content delivery networks, SaaS platforms and other third parties. It is important to identify these domains for DNS filters and hostname blocklists.Platform Domains
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{hidden}.dscx.akamaiedge.net | and 5 more |
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{hidden}.pacloudflare.com | |
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{hidden}.hosted-by-discourse.com |
Other Networks
There are tens of thousands of Internet network providers and we make an effort to track as many as we can, but we have less coverage for niche and local providers. The following is a sample of Let's Encrypt IP addresses on this type of network.
| ASN Description | ASN | Route | Location | IP | Shared |
|---|---|---|---|---|---|
| Akamai International | AS20940 | 104.121.128.0/18 | Netherlands | 104.121.145.167 |
SaaS - Software-as-a-Service
Applications often use various third party platforms for providing authentication, advertising, cybersecurity, e-mail services and more. The Software-as-a-Service (SaaS) platforms used by Let's Encrypt are summarized below.
| SaaS | # of IPs |
|---|---|
|
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2 |
| Service | Category | Sample IP | IP Count |
|---|---|---|---|
|
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Social Media | 184.105.99.106 | 2 IPs |
Hosting
Cloud hosting vendors like AWS and Microsoft Azure provide cloud-based computing and network resources to deliver applications. The hosting platforms used by Let's Encrypt are summarized below by geographical points-of-presence (PoP). Each PoP can host many IPs to deliver an application.
| Cloud Hosts | # of IPs |
|---|---|
|
|
19 |
|
|
2 |
|
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2 |
|
|
1 |
| Host | PoP | Location | IPs |
|---|---|---|---|
|
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Anycast | Global | 1 IP |
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Core | United States | 2 IPs |
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Anycast | Global | 1 IP |
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San Francisco | United States | 1 IP |
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San Francisco | United States | 2 IPs |
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Ashburn | United States | 4 IPs |
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Frankfurt am Main | Germany | 4 IPs |
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Singapore | Singapore | 3 IPs |
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Core | Brazil | 1 IP |
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Sydney | Australia | 1 IP |
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Core | Australia | 1 IP |
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Core | United States | 2 IPs |
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Core | Brazil | 1 IP |
Content Delivery Networks - CDNs
In order to get information to end users more quickly, many applications are distributed from multiple geographical points-of-presence (PoPs) using Content Delivery Networks (CDNs). Each PoP can host many IPs to deliver an application. A sample IP is provided.
Take special note of CDNs that use Anycast technology. Anycast makes it possible to route a single IP address to a variety of different geographic locations. In other words, one global Anycast IP is hosted in multiple geographic locations.
| CDNs | # of IPs |
|---|---|
|
|
6306 |
|
|
9 |
Anycast
| CDN | Network | Location | Sample IP | IPs |
|---|---|---|---|---|
|
|
|
Global | 172.65.32.248 | 4 IPs |
PoP Locations
| CDN | Network | PoP | Location | IPs |
|---|---|---|---|---|
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Mandaluyong | Philippines | 2 IPs |
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Prague | Czechia | 55 IPs |
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Amsterdam | Netherlands | 48 IPs |
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Vienna | Austria | 81 IPs |
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Athens | Greece | 52 IPs |
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Haarlem | Netherlands | 15 IPs |
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Moscow | Russia | 17 IPs |
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Lisbon | Portugal | 51 IPs |
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Madrid | Spain | 76 IPs |
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Frankfurt | Germany | 197 IPs |
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London | United Kingdom | 140 IPs |
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Marseille | France | 38 IPs |
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Fujairah | United Arab Emirates | 47 IPs |
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Paris | France | 142 IPs |
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Sao Paulo | Brazil | 96 IPs |
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Curitiba | Brazil | 22 IPs |
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Cape Town | South Africa | 35 IPs |
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Hamburg | Germany | 34 IPs |
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Chicago | United States | 150 IPs |
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Copenhagen | Denmark | 36 IPs |
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Amman | Jordan | 4 IPs |
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Bangkok | Thailand | 40 IPs |
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Bucharest | Romania | 38 IPs |
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Stockholm | Sweden | 84 IPs |
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Mombasa | Kenya | 42 IPs |
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Rio de Janeiro | Brazil | 36 IPs |
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Brussels | Belgium | 33 IPs |
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Istanbul | Turkey | 35 IPs |
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Ankara | Turkey | 5 IPs |
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Kampala | Uganda | 2 IPs |
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Dar es Salaam | Tanzania | 2 IPs |
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Palermo | Italy | 17 IPs |
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Santiago | Chile | 39 IPs |
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Buenos Aires | Argentina | 56 IPs |
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Ashburn | United States | 148 IPs |
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Dusseldorf | Germany | 28 IPs |
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Manchester | United Kingdom | 19 IPs |
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Tokyo | Japan | 197 IPs |
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Milan | Italy | 122 IPs |
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Sydney | Australia | 95 IPs |
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Dublin | Ireland | 36 IPs |
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Bogota | Colombia | 55 IPs |
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Seattle | United States | 70 IPs |
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Tempe | United States | 17 IPs |
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Rome | Italy | 44 IPs |
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Helsinki | Finland | 6 IPs |
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Warsaw | Poland | 44 IPs |
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Sofia | Bulgaria | 19 IPs |
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Houston | United States | 37 IPs |
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Salvador | Brazil | 3 IPs |
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Oslo | Norway | 56 IPs |
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Porto Alegre | Brazil | 25 IPs |
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Barcelona | Spain | 26 IPs |
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Glattbrugg | Switzerland | 41 IPs |
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Johannesburg | South Africa | 51 IPs |
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Kyiv | Ukraine | 6 IPs |
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Durban | South Africa | 7 IPs |
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Pretoria | South Africa | 1 IP |
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Berlin | Germany | 32 IPs |
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Fortaleza | Brazil | 40 IPs |
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Florianopolis | Brazil | 3 IPs |
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Vancouver | Canada | 28 IPs |
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Doha | Qatar | 1 IP |
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Atlanta | United States | 49 IPs |
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New York | United States | 47 IPs |
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Cyberjaya | Malaysia | 16 IPs |
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New Delhi | India | 107 IPs |
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Hong Kong | Hong Kong | 134 IPs |
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Dallas | United States | 112 IPs |
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Honolulu | United States | 3 IPs |
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Minneapolis | United States | 14 IPs |
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Bengaluru | India | 31 IPs |
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Los Angeles | United States | 103 IPs |
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Mexico City | Mexico | 14 IPs |
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Mount Prospect | United States | 28 IPs |
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Toronto | Canada | 52 IPs |
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Singapore | Singapore | 227 IPs |
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Lithia Springs | United States | 12 IPs |
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Melbourne | Australia | 87 IPs |
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Manila | Philippines | 6 IPs |
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Kolkata | India | 26 IPs |
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Chennai | India | 62 IPs |
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Hyderabad | India | 17 IPs |
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Mumbai | India | 92 IPs |
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Miami | United States | 158 IPs |
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Jakarta | Indonesia | 35 IPs |
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Irving | United States | 41 IPs |
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Kuala Lumpur | Malaysia | 25 IPs |
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Santiago de Queretaro | Mexico | 62 IPs |
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Englewood | United States | 27 IPs |
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Auckland | New Zealand | 24 IPs |
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Munich | Germany | 40 IPs |
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Seoul | South Korea | 86 IPs |
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Ho Chi Minh City | Vietnam | 8 IPs |
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Surabaya | Indonesia | 2 IPs |
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San Jose | United States | 45 IPs |
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Marietta | United States | 21 IPs |
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Secaucus | United States | 59 IPs |
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Boston | United States | 2 IPs |
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Philadelphia | United States | 10 IPs |
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Bekasi | Indonesia | 1 IP |
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Santa Clara | United States | 29 IPs |
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Hermosillo | Mexico | 1 IP |
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Cebu | Philippines | 1 IP |
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McAllen | United States | 26 IPs |
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Taipei | Taiwan | 41 IPs |
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San Juan | Puerto Rico | 6 IPs |
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Makati | Philippines | 3 IPs |
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Osaka | Japan | 6 IPs |
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Guadalajara | Mexico | 1 IP |
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Schiphol | Netherlands | 11 IPs |
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Perth | Australia | 19 IPs |
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Brisbane | Australia | 65 IPs |
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Montreal | Canada | 27 IPs |
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Kaohsiung | Taiwan | 2 IPs |
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Tel Aviv | Israel | 15 IPs |
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Taichung | Taiwan | 2 IPs |
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Hanoi | Vietnam | 8 IPs |
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Coimbatore | India | 8 IPs |
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Adelaide | Australia | 9 IPs |
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Lima | Peru | 31 IPs |
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Quezon City | Philippines | 5 IPs |
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Cleveland | United States | 2 IPs |
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Hillsboro | United States | 5 IPs |
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Pune | India | 1 IP |
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Pekanbaru | Indonesia | 1 IP |
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Dubai | United Arab Emirates | 32 IPs |
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Billerica | United States | 3 IPs |
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Mandaluyong | Philippines | 3 IPs |
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Lucena | Philippines | 1 IP |
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Sunshine Coast | Australia | 1 IP |
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Riyadh | Saudi Arabia | 3 IPs |
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Recife | Brazil | 18 IPs |
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Kansas City | United States | 1 IP |
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Las Vegas | United States | 4 IPs |
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Montevideo | Uruguay | 1 IP |
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San Pedro Sula | Honduras | 8 IPs |
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Omaha | United States | 3 IPs |
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Edmonton | Canada | 1 IP |
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Batam | Indonesia | 1 IP |
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Riga | Latvia | 2 IPs |
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Nonthaburi | Thailand | 11 IPs |
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Pittsburgh | United States | 1 IP |
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Baghdad | Iraq | 5 IPs |
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Kuwait City | Kuwait | 1 IP |
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Zurich | Switzerland | 1 IP |
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Muscat | Oman | 1 IP |
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Katowice | Poland | 8 IPs |
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Detroit | United States | 1 IP |
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Bhopal | India | 4 IPs |
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San Jose | Costa Rica | 4 IPs |
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Jeddah | Saudi Arabia | 4 IPs |
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Brasilia | Brazil | 6 IPs |
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Cordoba | Argentina | 3 IPs |
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Muscat | Oman | 2 IPs |
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Athens | Greece | 20 IPs |
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Palermo | Italy | 11 IPs |
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Milan | Italy | 14 IPs |
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Rome | Italy | 5 IPs |
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Vancouver | Canada | 2 IPs |
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San Fernando | Philippines | 1 IP |
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Makati | Philippines | 5 IPs |
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Manila | Philippines | 3 IPs |
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Budapest | Hungary | 10 IPs |
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Johannesburg | South Africa | 7 IPs |
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Dakar | Senegal | 2 IPs |
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Fort-de-France | Martinique | 4 IPs |
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Amman | Jordan | 14 IPs |
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Ho Chi Minh City | Vietnam | 7 IPs |
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Hanoi | Vietnam | 10 IPs |
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Mumbai | India | 4 IPs |
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Nagpur | India | 1 IP |
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Hyderabad | India | 2 IPs |
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New Delhi | India | 1 IP |
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Chennai | India | 2 IPs |
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Bengaluru | India | 2 IPs |
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Bangkok | Thailand | 16 IPs |
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Helsinki | Finland | 46 IPs |
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Stockholm | Sweden | 19 IPs |
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Santiago | Dominican Republic | 2 IPs |
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Sao Paulo | Brazil | 4 IPs |
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Salvador | Brazil | 3 IPs |
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Montreal | Canada | 8 IPs |
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Toronto | Canada | 2 IPs |
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Accra | Ghana | 5 IPs |
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Rome | Italy | 1 IP |
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Tirana | Albania | 2 IPs |
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Istanbul | Turkey | 4 IPs |
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Muscat | Oman | 5 IPs |
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Riyadh | United Arab Emirates | 1 IP |
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Amman | Jordan | 10 IPs |
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Vilnius | Lithuania | 10 IPs |
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Milan | Italy | 2 IPs |
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Bucharest | Romania | 2 IPs |
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Moscow | Russia | 4 IPs |
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Riga | Latvia | 43 IPs |
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Helsinki | Finland | 7 IPs |
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Amman | Jordan | 6 IPs |
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Luanda | Angola | 4 IPs |
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Manila | Philippines | 11 IPs |
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Ulaanbaatar | Mongolia | 8 IPs |
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Melbourne | Australia | 4 IPs |
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Brisbane | Australia | 4 IPs |
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Santa Cruz | Bolivia | 6 IPs |
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Buenos Aires | Argentina | 1 IP |
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Lima | Peru | 15 IPs |
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Arica | Argentina | 4 IPs |
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Sydney | Australia | 8 IPs |
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Brisbane | Australia | 1 IP |
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Hong Kong | Hong Kong | 4 IPs |
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Hanoi | Vietnam | 1 IP |
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Taipei | Taiwan | 5 IPs |
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Resistencia | Argentina | 8 IPs |
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Buenos Aires | Argentina | 2 IPs |
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Port of Spain | Trinidad and Tobago | 4 IPs |
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Montreal | Canada | 3 IPs |
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San Jose | Costa Rica | 6 IPs |
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Guayaquil | Ecuador | 4 IPs |
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Helsinki | Finland | 16 IPs |
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Helsinki | Finland | 3 IPs |
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Vilnius | Lithuania | 4 IPs |
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Stockholm | Sweden | 4 IPs |
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Lausanne | Switzerland | 15 IPs |
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Zurich | Switzerland | 12 IPs |
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Bern | Switzerland | 2 IPs |
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Nicosia | Cyprus | 8 IPs |
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Johannesburg | South Africa | 9 IPs |
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Sydney | Australia | 2 IPs |
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Makati | Philippines | 6 IPs |
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San Fernando | Philippines | 1 IP |
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Manila | Philippines | 5 IPs |
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Vancouver | Canada | 7 IPs |
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Kansas City | United States | 3 IPs |
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Hanoi | Vietnam | 16 IPs |
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Ho Chi Minh City | Vietnam | 4 IPs |
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Dortmund | Germany | 4 IPs |
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Taipei | Taiwan | 7 IPs |
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Vienna | Austria | 2 IPs |
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Mombasa | Kenya | 2 IPs |
Other Locations
| CDN | Network | PoP | Location | IPs |
|---|---|---|---|---|
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Core Network | United States | 5 IPs |
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Core Network | United States | 3 IPs |
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Core Network | Philippines | 1 IP |
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Core Network | Singapore | 2 IPs |
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ASN AS38040 | Core Network | Thailand | 8 IPs |
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ASN AS8932 | Core Network | Armenia | 3 IPs |
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ASN AS51407 | Core Network | Palestine | 5 IPs |
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ASN AS55915 | Core Network | Nepal | 10 IPs |
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ASN AS9416 | Core Network | Taiwan | 16 IPs |
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ASN AS28917 | Core Network | Ukraine | 2 IPs |
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ASN AS8400 | Core Network | Serbia | 8 IPs |
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ASN AS12578 | Core Network | Latvia | 5 IPs |
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ASN AS8551 | Core Network | Israel | 6 IPs |
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ASN AS12400 | Core Network | Israel | 18 IPs |
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ASN AS8681 | Core Network | Jersey | 7 IPs |
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ASN AS31117 | Core Network | Slovakia | 8 IPs |
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ASN AS35805 | Core Network | Georgia | 3 IPs |
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ASN AS34779 | Core Network | Slovenia | 8 IPs |
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ASN AS9038 | Core Network | Jordan | 5 IPs |
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ASN AS3292 | Core Network | Denmark | 12 IPs |
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ASN AS34772 | Core Network | North Macedonia | 8 IPs |
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ASN AS45498 | Core Network | Cambodia | 1 IP |
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ASN AS138754 | Core Network | India | 8 IPs |
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ASN AS55943 | Core Network | French Polynesia | 6 IPs |
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ASN AS36884 | Core Network | Morocco | 1 IP |
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Core Network | Vietnam | 1 IP |
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ASN AS55818 | Core Network | Indonesia | 1 IP |
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ASN AS9381 | Core Network | Hong Kong | 11 IPs |
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ASN AS132165 | Core Network | Pakistan | 4 IPs |
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ASN AS4651 | Core Network | Thailand | 7 IPs |
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ASN AS3216 | Core Network | Russia | 4 IPs |
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Core Network | Philippines | 2 IPs |
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ASN AS21277 | Core Network | Iraq | 2 IPs |
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ASN AS14988 | Core Network | Botswana | 2 IPs |
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Core Network | Thailand | 1 IP |
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ASN AS38623 | Core Network | Cambodia | 4 IPs |
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ASN AS6057 | Core Network | Uruguay | 10 IPs |
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ASN AS17557 | Core Network | Pakistan | 4 IPs |
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ASN AS200612 | Core Network | Qatar | 2 IPs |
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ASN AS21826 | Core Network | Venezuela | 10 IPs |
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ASN AS5639 | Core Network | Trinidad and Tobago | 2 IPs |
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ASN AS20485 | Core Network | Russia | 6 IPs |
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ASN AS27839 | Core Network | Bolivia | 8 IPs |
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ASN AS27773 | Core Network | El Salvador | 4 IPs |
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ASN AS6697 | Core Network | Belarus | 6 IPs |
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ASN AS5408 | Core Network | Greece | 3 IPs |
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ASN AS1930 | Core Network | Portugal | 8 IPs |
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ASN AS5391 | Core Network | Croatia | 4 IPs |
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ASN AS9121 | Core Network | Turkey | 2 IPs |
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ASN AS10269 | Core Network | Belize | 3 IPs |
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ASN AS10269 | Core Network | United States | 3 IPs |
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ASN AS265721 | Core Network | Dominican Republic | 4 IPs |
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ASN AS7738 | Core Network | Brazil | 3 IPs |
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ASN AS9873 | Core Network | Laos | 6 IPs |
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ASN AS9246 | Core Network | Guam | 8 IPs |
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ASN AS10094 | Core Network | Brunei | 3 IPs |
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ASN AS23969 | Core Network | Thailand | 1 IP |
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ASN AS17976 | Core Network | Cambodia | 4 IPs |
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ASN AS9848 | Core Network | South Korea | 1 IP |
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ASN AS9930 | Core Network | Malaysia | 5 IPs |
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ASN AS39010 | Core Network | Lebanon | 8 IPs |
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ASN AS39232 | Core Network | Azerbaijan | 4 IPs |
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ASN AS31027 | Core Network | Denmark | 2 IPs |
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ASN AS55329 | Core Network | Cambodia | 6 IPs |
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ASN AS13004 | Core Network | Serbia | 4 IPs |
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ASN AS4609 | Core Network | Macao | 2 IPs |
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ASN AS28716 | Core Network | Italy | 2 IPs |
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Core Network | Finland | 2 IPs |
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ASN AS2609 | Core Network | Tunisia | 4 IPs |
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ASN AS45903 | Core Network | Vietnam | 4 IPs |
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Core Network | India | 2 IPs |
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Core Network | Philippines | 5 IPs |
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ASN AS55824 | Core Network | India | 4 IPs |
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ASN AS15146 | Core Network | Bahamas | 4 IPs |
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ASN AS3132 | Core Network | Peru | 4 IPs |
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ASN AS27895 | Core Network | Paraguay | 2 IPs |
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ASN AS1680 | Core Network | Israel | 4 IPs |
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Core Network | Finland | 3 IPs |
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Core Network | Oman | 3 IPs |
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ASN AS197563 | Core Network | Ukraine | 2 IPs |
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