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 operated 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 |
Core Networks
Applications are sometimes deployed on partner networks, parent company networks, or regional hosting providers. The following is a sample of Let's Encrypt IP addresses deployed on this type of network.
| Network | PoP | Category | Location | Route |
|---|---|---|---|---|
|
|
Core Network | ISP/Telco | India | 49.44.204.0/22 |
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 |
|---|---|
|
|
2 |
| Service | Category | Sample IP | IP Count |
|---|---|---|---|
|
|
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 here.
Let's Encrypt leverages multiple cloud providers to support different components of its service architecture. These platforms are used to deliver core application functionality, including API endpoints, data processing services, and hybrid content distribution, allowing Let's Encrypt to optimize performance, reliability, and scalability across its offerings.
| Cloud Hosts | # of IPs |
|---|---|
|
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2 |
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20 |
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2 |
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1 |
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2 |
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1 |
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 |
|---|---|
|
|
6713 |
|
|
9 |
Anycast
| CDN | Network | Location | Sample IP | IPs |
|---|---|---|---|---|
|
|
|
Global | 172.65.32.248 | 8 IPs |
PoP Locations
| CDN | Network | PoP | Location | IPs |
|---|---|---|---|---|
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Prague | Czechia | 66 IPs |
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Amsterdam | Netherlands | 52 IPs |
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Vienna | Austria | 94 IPs |
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Athens | Greece | 56 IPs |
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Haarlem | Netherlands | 17 IPs |
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Moscow | Russia | 18 IPs |
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Frankfurt | Germany | 215 IPs |
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London | United Kingdom | 161 IPs |
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Fujairah | United Arab Emirates | 54 IPs |
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Paris | France | 169 IPs |
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Sao Paulo | Brazil | 111 IPs |
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Toronto | Canada | 55 IPs |
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Warsaw | Poland | 35 IPs |
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Curitiba | Brazil | 25 IPs |
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Cape Town | South Africa | 23 IPs |
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Hamburg | Germany | 20 IPs |
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Madrid | Spain | 82 IPs |
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Chicago | United States | 146 IPs |
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Copenhagen | Denmark | 34 IPs |
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Amman | Jordan | 8 IPs |
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Bangkok | Thailand | 39 IPs |
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Brussels | Belgium | 34 IPs |
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Manchester | United Kingdom | 32 IPs |
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Bucharest | Romania | 46 IPs |
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Stockholm | Sweden | 88 IPs |
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Mombasa | Kenya | 47 IPs |
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Rio de Janeiro | Brazil | 34 IPs |
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Istanbul | Turkey | 47 IPs |
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Ankara | Turkey | 5 IPs |
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Kampala | Uganda | 8 IPs |
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Santiago | Chile | 50 IPs |
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Buenos Aires | Argentina | 63 IPs |
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Ashburn | United States | 142 IPs |
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Dusseldorf | Germany | 30 IPs |
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Sydney | Australia | 97 IPs |
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Tokyo | Japan | 216 IPs |
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Milan | Italy | 97 IPs |
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Dublin | Ireland | 40 IPs |
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Bogota | Colombia | 52 IPs |
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Lisbon | Portugal | 64 IPs |
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Seattle | United States | 61 IPs |
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Sofia | Bulgaria | 15 IPs |
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Houston | United States | 41 IPs |
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Palermo | Italy | 21 IPs |
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Salvador | Brazil | 3 IPs |
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Oslo | Norway | 52 IPs |
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Porto Alegre | Brazil | 25 IPs |
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Barcelona | Spain | 28 IPs |
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Glattbrugg | Switzerland | 40 IPs |
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Rome | Italy | 35 IPs |
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Durban | South Africa | 4 IPs |
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Pretoria | South Africa | 1 IP |
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Berlin | Germany | 37 IPs |
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Marseille | France | 26 IPs |
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Fortaleza | Brazil | 34 IPs |
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Florianopolis | Brazil | 10 IPs |
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Vancouver | Canada | 37 IPs |
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Johannesburg | South Africa | 62 IPs |
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Doha | Qatar | 2 IPs |
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Lima | Peru | 32 IPs |
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Dallas | United States | 109 IPs |
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Hong Kong | Hong Kong | 167 IPs |
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Mandaluyong | Philippines | 3 IPs |
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Brasilia | Brazil | 21 IPs |
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New Delhi | India | 132 IPs |
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Los Angeles | United States | 114 IPs |
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Miami | United States | 164 IPs |
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Secaucus | United States | 70 IPs |
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San Jose | United States | 40 IPs |
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Taipei | Taiwan | 41 IPs |
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Melbourne | Australia | 97 IPs |
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Singapore | Singapore | 285 IPs |
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Santiago de Queretaro | Mexico | 65 IPs |
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Jakarta | Indonesia | 25 IPs |
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Seoul | South Korea | 90 IPs |
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New York | United States | 43 IPs |
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Mount Prospect | United States | 27 IPs |
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Ho Chi Minh City | Vietnam | 7 IPs |
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McAllen | United States | 27 IPs |
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Atlanta | United States | 53 IPs |
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Tempe | United States | 15 IPs |
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Cleveland | United States | 3 IPs |
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Hanoi | Vietnam | 11 IPs |
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Lucena | Philippines | 1 IP |
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Brisbane | Australia | 67 IPs |
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Sunshine Coast | Australia | 1 IP |
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Kuala Lumpur | Malaysia | 47 IPs |
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Chennai | India | 73 IPs |
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Irving | United States | 42 IPs |
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Lithia Springs | United States | 15 IPs |
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Dar es Salaam | Tanzania | 4 IPs |
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Cyberjaya | Malaysia | 21 IPs |
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Honolulu | United States | 3 IPs |
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Minneapolis | United States | 14 IPs |
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Manila | Philippines | 3 IPs |
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Kolkata | India | 24 IPs |
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Hyderabad | India | 17 IPs |
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Mumbai | India | 114 IPs |
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Bengaluru | India | 36 IPs |
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Englewood | United States | 24 IPs |
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Munich | Germany | 37 IPs |
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Surabaya | Indonesia | 2 IPs |
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Marietta | United States | 20 IPs |
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Boston | United States | 6 IPs |
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Bekasi | Indonesia | 1 IP |
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Auckland | New Zealand | 28 IPs |
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Mexico City | Mexico | 12 IPs |
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Santa Clara | United States | 24 IPs |
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Hermosillo | Mexico | 1 IP |
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Cebu | Philippines | 1 IP |
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San Juan | Puerto Rico | 4 IPs |
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Makati | Philippines | 3 IPs |
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Osaka | Japan | 6 IPs |
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Riyadh | Saudi Arabia | 4 IPs |
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Guadalajara | Mexico | 1 IP |
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Schiphol | Netherlands | 14 IPs |
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Helsinki | Finland | 4 IPs |
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Philadelphia | United States | 1 IP |
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Tel Aviv | Israel | 13 IPs |
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Katowice | Poland | 8 IPs |
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Kaohsiung | Taiwan | 2 IPs |
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Taichung | Taiwan | 2 IPs |
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Dubai | United Arab Emirates | 40 IPs |
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Perth | Australia | 19 IPs |
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Coimbatore | India | 8 IPs |
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Adelaide | Australia | 9 IPs |
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Montreal | Canada | 15 IPs |
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Quezon City | Philippines | 3 IPs |
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Hillsboro | United States | 3 IPs |
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Pune | India | 1 IP |
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Pekanbaru | Indonesia | 1 IP |
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Omaha | United States | 5 IPs |
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Recife | Brazil | 27 IPs |
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Las Vegas | United States | 4 IPs |
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Montevideo | Uruguay | 2 IPs |
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San Pedro Sula | Honduras | 8 IPs |
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Baghdad | Iraq | 5 IPs |
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Edmonton | Canada | 1 IP |
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Detroit | United States | 2 IPs |
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Batam | Indonesia | 1 IP |
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Riga | Latvia | 2 IPs |
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Nonthaburi | Thailand | 9 IPs |
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Pittsburgh | United States | 1 IP |
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Nagpur | India | 1 IP |
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Abidjan | Ivory Coast | 8 IPs |
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Zurich | Switzerland | 1 IP |
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Muscat | Oman | 1 IP |
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Lucknow | India | 2 IPs |
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Bhopal | India | 4 IPs |
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San Jose | Costa Rica | 3 IPs |
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Jeddah | Saudi Arabia | 4 IPs |
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Istanbul | Turkey | 4 IPs |
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Accra | Ghana | 4 IPs |
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Amman | Jordan | 16 IPs |
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Riga | Latvia | 4 IPs |
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Vilnius | Lithuania | 4 IPs |
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Johannesburg | South Africa | 8 IPs |
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Kharkiv | Ukraine | 10 IPs |
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Kyiv | Ukraine | 2 IPs |
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Riga | Latvia | 53 IPs |
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Muscat | Oman | 8 IPs |
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Bucharest | Romania | 6 IPs |
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Amman | Jordan | 10 IPs |
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Riyadh | Saudi Arabia | 1 IP |
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Muscat | Oman | 6 IPs |
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Vancouver | Canada | 2 IPs |
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San Fernando | Philippines | 1 IP |
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Makati | Philippines | 6 IPs |
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Manila | Philippines | 6 IPs |
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Seoul | South Korea | 2 IPs |
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Copenhagen | Denmark | 1 IP |
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Helsinki | Finland | 5 IPs |
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Toronto | Canada | 4 IPs |
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Richmond Hill | Canada | 2 IPs |
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Luanda | Angola | 4 IPs |
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Manila | Philippines | 14 IPs |
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Ho Chi Minh City | Vietnam | 6 IPs |
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Hanoi | Vietnam | 25 IPs |
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Ulaanbaatar | Mongolia | 8 IPs |
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Brisbane | Australia | 4 IPs |
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Melbourne | Australia | 4 IPs |
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Brisbane | Australia | 2 IPs |
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Hong Kong | Hong Kong | 4 IPs |
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Sydney | Australia | 8 IPs |
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Hanoi | Vietnam | 1 IP |
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Amman | Jordan | 4 IPs |
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Resistencia | Argentina | 8 IPs |
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Buenos Aires | Argentina | 2 IPs |
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Montreal | Canada | 4 IPs |
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San Jose | Costa Rica | 8 IPs |
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Palanga | Lithuania | 2 IPs |
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Sao Paulo | Brazil | 7 IPs |
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Taipei | Taiwan | 28 IPs |
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Sydney | Australia | 1 IP |
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Adelaide | Australia | 1 IP |
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Vancouver | Canada | 5 IPs |
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Tampere | Finland | 4 IPs |
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Dortmund | Germany | 4 IPs |
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Kolkata | India | 2 IPs |
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Guwahati | India | 2 IPs |
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Ho Chi Minh City | Vietnam | 2 IPs |
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Bangkok | Thailand | 7 IPs |
Other Locations
| CDN | Network | PoP | Location | IPs |
|---|---|---|---|---|
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Core Network | United States | 1 IP |
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Core Network | Poland | 3 IPs |
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Core Network | United States | 5 IPs |
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Core Network | Singapore | 2 IPs |
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Core Network | Australia | 2 IPs |
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Core Network | Thailand | 1 IP |
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Core Network | Germany | 1 IP |
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Core Network | France | 1 IP |
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Core Network | Philippines | 1 IP |
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ASN AS8400 | Core Network | Serbia | 6 IPs |
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ASN AS6855 | Core Network | Slovakia | 4 IPs |
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ASN AS39010 | Core Network | Lebanon | 8 IPs |
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Core Network | Lithuania | 4 IPs |
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Core Network | Finland | 3 IPs |
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Core Network | Sweden | 4 IPs |
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ASN AS8932 | Core Network | Armenia | 4 IPs |
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ASN AS34779 | Core Network | Slovenia | 6 IPs |
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ASN AS31117 | Core Network | Slovakia | 8 IPs |
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ASN AS1680 | Core Network | Israel | 4 IPs |
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Core Network | Greece | 19 IPs |
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Core Network | Italy | 32 IPs |
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ASN AS8681 | Core Network | Jersey | 6 IPs |
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ASN AS6697 | Core Network | Belarus | 9 IPs |
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ASN AS16010 | Core Network | Georgia | 6 IPs |
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ASN AS197563 | Core Network | Ukraine | 4 IPs |
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ASN AS39232 | Core Network | Azerbaijan | 6 IPs |
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Core Network | South Africa | 4 IPs |
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ASN AS15146 | Core Network | Bahamas | 8 IPs |
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Core Network | Hungary | 10 IPs |
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ASN AS2609 | Core Network | Tunisia | 8 IPs |
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Core Network | Vietnam | 11 IPs |
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ASN AS58511 | Core Network | Australia | 4 IPs |
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ASN AS4609 | Core Network | Macao | 2 IPs |
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ASN AS38040 | Core Network | Thailand | 3 IPs |
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ASN AS45903 | Core Network | Vietnam | 8 IPs |
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ASN AS51407 | Core Network | Palestine | 4 IPs |
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Core Network | India | 9 IPs |
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ASN AS55915 | Core Network | Nepal | 8 IPs |
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ASN AS9416 | Core Network | Taiwan | 12 IPs |
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ASN AS28917 | Core Network | Ukraine | 4 IPs |
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Core Network | Finland | 47 IPs |
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Core Network | Sweden | 16 IPs |
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ASN AS12578 | Core Network | Latvia | 3 IPs |
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ASN AS12400 | Core Network | Israel | 23 IPs |
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ASN AS35805 | Core Network | Georgia | 4 IPs |
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ASN AS9038 | Core Network | Jordan | 6 IPs |
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ASN AS13004 | Core Network | Serbia | 7 IPs |
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ASN AS3292 | Core Network | Denmark | 8 IPs |
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ASN AS38193 | Core Network | Pakistan | 8 IPs |
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ASN AS138754 | Core Network | India | 8 IPs |
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ASN AS55943 | Core Network | French Polynesia | 4 IPs |
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Core Network | Vietnam | 1 IP |
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ASN AS9873 | Core Network | Laos | 8 IPs |
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ASN AS55818 | Core Network | Indonesia | 1 IP |
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ASN AS9381 | Core Network | Hong Kong | 5 IPs |
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ASN AS132165 | Core Network | Pakistan | 8 IPs |
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ASN AS4651 | Core Network | Thailand | 9 IPs |
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ASN AS3216 | Core Network | Russia | 2 IPs |
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Core Network | Philippines | 2 IPs |
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Core Network | Philippines | 7 IPs |
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Core Network | Brazil | 8 IPs |
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Core Network | Argentina | 2 IPs |
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Core Network | Peru | 11 IPs |
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ASN AS14988 | Core Network | Botswana | 2 IPs |
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Core Network | Taiwan | 5 IPs |
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ASN AS6057 | Core Network | Uruguay | 13 IPs |
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ASN AS17557 | Core Network | Pakistan | 4 IPs |
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ASN AS20764 | Core Network | Russia | 3 IPs |
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ASN AS200612 | Core Network | Qatar | 6 IPs |
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ASN AS21826 | Core Network | Venezuela | 9 IPs |
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ASN AS5639 | Core Network | Trinidad and Tobago | 3 IPs |
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ASN AS20485 | Core Network | Russia | 9 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 AS5603 | Core Network | Slovenia | 5 IPs |
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Core Network | Finland | 4 IPs |
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Core Network | Switzerland | 24 IPs |
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ASN AS5408 | Core Network | Greece | 6 IPs |
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ASN AS1930 | Core Network | Portugal | 12 IPs |
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Core Network | South Africa | 6 IPs |
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ASN AS327899 | Core Network | Rwanda | 2 IPs |
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ASN AS10269 | Core Network | Belize | 4 IPs |
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ASN AS10269 | Core Network | United States | 3 IPs |
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ASN AS7738 | Core Network | Brazil | 2 IPs |
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Core Network | Brazil | 2 IPs |
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Core Network | Australia | 1 IP |
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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 AS17976 | Core Network | Cambodia | 4 IPs |
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ASN AS9848 | Core Network | South Korea | 1 IP |
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Core Network | Japan | 1 IP |
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ASN AS9930 | Core Network | Malaysia | 5 IPs |
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ASN AS8359 | Core Network | Russia | 2 IPs |
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ASN AS31027 | Core Network | Denmark | 2 IPs |
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ASN AS4760 | Core Network | Hong Kong | 4 IPs |
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ASN AS1237 | Core Network | South Korea | 3 IPs |
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ASN AS28716 | Core Network | Italy | 2 IPs |
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Core Network | Philippines | 2 IPs |
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ASN AS8551 | Core Network | Israel | 4 IPs |
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ASN AS55329 | Core Network | Cambodia | 4 IPs |
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ASN AS45820 | Core Network | India | 2 IPs |
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ASN AS55824 | Core Network | India | 4 IPs |
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Core Network | Thailand | 8 IPs |
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ASN AS139922 | Core Network | Nepal | 2 IPs |
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