Let's Encrypt
Let's Encrypt Application
Application Information
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 | Technology |
| Web Link | Let's Encrypt - Home Page |
Network Intelligence
The network data shown here is also available via the Netify Data Feed API. We provide network intelligence to help deliver better digital experiences to end users and businesses.
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
 Akamai
|
lencr.edgesuite.net | and 1 more |
 Cloudflare
|
{hidden}.pacloudflare.com | |
 Discourse
|
{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 | IP | Shared |
|---|---|---|---|---|---|
 Samsung SDS
|
Core Network | Business | South Korea | 157.197.173.179 | |
 KT
|
Core Network | ISP/Telco | South Korea | 220.90.198.72 | |
|
KT
|
Core Network | ISP/Telco | South Korea | 220.90.198.82 |
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 |
|---|---|
|
Discourse
|
2 |
| Service | Category | Sample IP | IP Count |
|---|---|---|---|
|
Discourse
|
Social Media | 184.105.99.43 | 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 |
|---|---|
Netlify Hosting
|
46 |
Flexential
|
2 |
Amazon AWS
|
1 |
| Host | PoP | Location | Sample IP | IPs |
|---|---|---|---|---|
|
Flexential
|
Core | United States | 66.133.109.36 | 2 IPs |
|
Amazon AWS
|
San Francisco | United States | 52.9.173.94 | 1 IP |
|
Netlify Hosting
|
Frankfurt | Germany | 3.72.140.173 | 12 IPs |
|
Netlify Hosting
|
Singapore | Singapore | 13.251.96.10 | 10 IPs |
|
Netlify Hosting
|
San Francisco | United States | 13.57.148.141 | 6 IPs |
|
Netlify Hosting
|
Ashburn | United States | 18.213.222.111 | 12 IPs |
|
Netlify Hosting
|
Sao Paulo | Brazil | 54.232.109.9 | 6 IPs |
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 |
|---|---|
|
Akamai
|
3585 |
|
Cloudflare
|
5 |
Anycast
| CDN | Network | Location | Sample IP | IPs |
|---|---|---|---|---|
|
Cloudflare
|
Cloudflare
|
Global | 172.65.32.248 | 4 IPs |
PoP Locations
| CDN | Network | PoP | Location | IPs |
|---|---|---|---|---|
|
Akamai
|
Akamai
|
Prague | Czechia | 30 IPs |
|
Akamai
|
Akamai
|
Moscow | Russia | 4 IPs |
|
Akamai
|
Akamai
|
Marseille | France | 7 IPs |
|
Akamai
|
Akamai
|
Isando | South Africa | 40 IPs |
|
Akamai
|
Akamai
|
Warsaw | Poland | 28 IPs |
|
Akamai
|
Akamai
|
London | United Kingdom | 175 IPs |
|
Akamai
|
Akamai
|
Istanbul | Turkey | 31 IPs |
|
Akamai
|
Akamai
|
Palermo | Italy | 10 IPs |
|
Akamai
|
Akamai
|
Cape Town | South Africa | 13 IPs |
|
Akamai
|
Akamai
|
Santiago | Chile | 17 IPs |
|
Akamai
|
Akamai
|
Johannesburg | South Africa | 15 IPs |
|
Akamai
|
Akamai
|
Milan | Italy | 170 IPs |
|
Akamai
|
Akamai
|
Madrid | Spain | 47 IPs |
|
Akamai
|
Akamai
|
Lisbon | Portugal | 19 IPs |
|
Akamai
|
Akamai
|
Liljeholmen | Sweden | 2 IPs |
|
Akamai
|
Akamai
|
Taipei | Taiwan | 21 IPs |
|
Akamai
|
Akamai
|
Chennai | India | 16 IPs |
|
Akamai
|
Akamai
|
Munich | Germany | 8 IPs |
|
Akamai
|
Akamai
|
Glattbrugg | Switzerland | 11 IPs |
|
Akamai
|
Akamai
|
Sydney | Australia | 81 IPs |
|
Akamai
|
Akamai
|
Sao Paulo | Brazil | 24 IPs |
|
Akamai
|
Akamai
|
Ashburn | United States | 89 IPs |
|
Akamai
|
Akamai
|
Los Angeles | United States | 74 IPs |
|
Akamai
|
Akamai
|
Dallas | United States | 172 IPs |
|
Akamai
|
Akamai
|
Atlanta | United States | 51 IPs |
|
Akamai
|
Akamai
|
Kolkata | India | 5 IPs |
|
Akamai
|
Akamai
|
Curitiba | Brazil | 5 IPs |
|
Akamai
|
Akamai
|
Santa Clara | United States | 68 IPs |
|
Akamai
|
Akamai
|
Tokyo | Japan | 26 IPs |
|
Akamai
|
Akamai
|
Mount Prospect | United States | 27 IPs |
|
Akamai
|
Akamai
|
Tempe | United States | 13 IPs |
|
Akamai
|
Akamai
|
Frankfurt | Germany | 113 IPs |
|
Akamai
|
Akamai
|
Englewood | United States | 24 IPs |
|
Akamai
|
Akamai
|
Mexico City | Mexico | 19 IPs |
|
Akamai
|
Akamai
|
Jeddah | Saudi Arabia | 10 IPs |
|
Akamai
|
Akamai
|
Boston | United States | 10 IPs |
|
Akamai
|
Akamai
|
Chicago | United States | 213 IPs |
|
Akamai
|
Akamai
|
Melbourne | Australia | 52 IPs |
|
Akamai
|
Akamai
|
Hamburg | Germany | 7 IPs |
|
Akamai
|
Akamai
|
Norfolk | United States | 4 IPs |
|
Akamai
|
Akamai
|
Fortaleza | Brazil | 9 IPs |
|
Akamai
|
Akamai
|
Bangkok | Thailand | 11 IPs |
|
Akamai
|
Akamai
|
Irving | United States | 53 IPs |
|
Akamai
|
Akamai
|
Copenhagen | Denmark | 18 IPs |
|
Akamai
|
Akamai
|
Hong Kong | Hong Kong | 41 IPs |
|
Akamai
|
Akamai
|
Seoul | South Korea | 49 IPs |
|
Akamai
|
Akamai
|
Miami | United States | 86 IPs |
|
Akamai
|
Akamai
|
Newark | United States | 5 IPs |
|
Akamai
|
Akamai
|
Houston | United States | 16 IPs |
|
Akamai
|
Akamai
|
Brisbane | Australia | 35 IPs |
|
Akamai
|
Akamai
|
Muscat | Oman | 2 IPs |
|
Akamai
|
Akamai
|
Osaka | Japan | 19 IPs |
|
Akamai
|
Akamai
|
Tel Aviv | Israel | 4 IPs |
|
Akamai
|
Akamai
|
San Diego | United States | 4 IPs |
|
Akamai
|
Akamai
|
El Segundo | United States | 23 IPs |
|
Akamai
|
Akamai
|
New Delhi | India | 46 IPs |
|
Akamai
|
Akamai
|
San Jose | United States | 87 IPs |
|
Akamai
|
Akamai
|
Singapore | Singapore | 108 IPs |
|
Akamai
|
Akamai
|
Seattle | United States | 79 IPs |
|
Akamai
|
Akamai
|
Buenos Aires | Argentina | 19 IPs |
|
Akamai
|
Akamai
|
Montreal | Canada | 9 IPs |
|
Akamai
|
Akamai
|
Rio de Janeiro | Brazil | 9 IPs |
|
Akamai
|
Akamai
|
Santiago de Queretaro | Mexico | 25 IPs |
|
Akamai
|
Akamai
|
Centurion | South Africa | 1 IP |
|
Akamai
|
Akamai
|
Toronto | Canada | 25 IPs |
|
Akamai
|
Akamai
|
Berlin | Germany | 6 IPs |
|
Akamai
|
Akamai
|
McAllen | 13 IPs | |
|
Akamai
|
Akamai
|
Dubai | United Arab Emirates | 6 IPs |
|
Akamai
|
Akamai
|
Jakarta | Indonesia | 11 IPs |
|
Akamai
|
Akamai
|
Secaucus | United States | 32 IPs |
|
Akamai
|
Akamai
|
Cleveland | United States | 6 IPs |
|
Akamai
|
Akamai
|
Adelaide | Australia | 13 IPs |
|
Akamai
|
Akamai
|
Mumbai | India | 27 IPs |
|
Akamai
|
Akamai
|
Amsterdam | Netherlands | 12 IPs |
|
Akamai
|
Akamai
|
Dusseldorf | Germany | 8 IPs |
|
Akamai
|
Akamai
|
Rome | Italy | 17 IPs |
|
Akamai
|
Akamai
|
New York | United States | 15 IPs |
|
Akamai
|
Akamai
|
Manchester | United Kingdom | 4 IPs |
|
Akamai
|
Akamai
|
Richardson | United States | 9 IPs |
|
Akamai
|
Akamai
|
Schiphol | Netherlands | 9 IPs |
|
Akamai
|
Akamai
|
Piscataway | United States | 17 IPs |
|
Akamai
|
Akamai
|
Marietta | United States | 22 IPs |
|
Akamai
|
Akamai
|
Vienna | Austria | 41 IPs |
|
Akamai
|
Akamai
|
Puebla | Mexico | 2 IPs |
|
Akamai
|
Akamai
|
Bekasi | Indonesia | 1 IP |
|
Akamai
|
Akamai
|
Haarlem | Netherlands | 7 IPs |
|
Akamai
|
Akamai
|
Mombasa | Kenya | 5 IPs |
|
Akamai
|
Akamai
|
Helsinki | Finland | 2 IPs |
|
Akamai
|
Akamai
|
Batam | Indonesia | 1 IP |
|
Akamai
|
Akamai
|
Dublin | Ireland | 28 IPs |
|
Akamai
|
Akamai
|
Philadelphia | United States | 10 IPs |
|
Akamai
|
Akamai
|
Edison | United States | 20 IPs |
|
Akamai
|
Akamai
|
Bogota | Colombia | 18 IPs |
|
Akamai
|
Akamai
|
Hyderabad | India | 2 IPs |
|
Akamai
|
Akamai
|
Cyberjaya | Malaysia | 2 IPs |
|
Akamai
|
Akamai
|
Perth | Australia | 23 IPs |
|
Akamai
|
Akamai
|
Vancouver | Canada | 16 IPs |
|
Akamai
|
Akamai
|
Kuwait City | Kuwait | 1 IP |
|
Akamai
|
Akamai
|
Quito | Ecuador | 1 IP |
|
Akamai
|
Akamai
|
Stockholm | Sweden | 24 IPs |
|
Akamai
|
Akamai
|
Minneapolis | United States | 11 IPs |
|
Akamai
|
Akamai
|
Pune | India | 1 IP |
|
Akamai
|
Akamai
|
Hanoi | Vietnam | 2 IPs |
|
Akamai
|
Akamai
|
Auckland | New Zealand | 3 IPs |
|
Akamai
|
Akamai
|
Paris | France | 53 IPs |
|
Akamai
|
Akamai
|
Oslo | Norway | 9 IPs |
|
Akamai
|
Akamai
|
Amman | Jordan | 2 IPs |
|
Akamai
|
Akamai
|
Doha | Qatar | 1 IP |
|
Akamai
|
Akamai
|
Southfield | United States | 1 IP |
|
Akamai
|
Akamai
|
Ahmedabad | India | 1 IP |
|
Akamai
|
Akamai
|
Taichung | Taiwan | 2 IPs |
|
Akamai
|
Akamai
|
Randburg | South Africa | 1 IP |
|
Akamai
|
Akamai
|
Bucharest | Romania | 12 IPs |
|
Akamai
|
Akamai
|
Makati | Philippines | 3 IPs |
|
Akamai
|
Akamai
|
Billerica | United States | 5 IPs |
|
Akamai
|
Akamai
|
Kaohsiung | Taiwan | 2 IPs |
|
Akamai
|
Akamai
|
Riyadh | Saudi Arabia | 5 IPs |
|
Akamai
|
Akamai
|
Lima | Peru | 1 IP |
|
Akamai
|
Akamai
|
Pasig | Philippines | 1 IP |
|
Akamai
|
Akamai
|
Bengaluru | India | 9 IPs |
|
Akamai
|
Akamai
|
Brussels | Belgium | 7 IPs |
|
Akamai
|
Akamai
|
Zurich | Switzerland | 7 IPs |
|
Akamai
|
Akamai
|
Rancho Cordova | United States | 5 IPs |
|
Akamai
|
Akamai
|
Brasilia | Brazil | 3 IPs |
|
Akamai
|
Akamai
|
Athens | Greece | 7 IPs |
|
Akamai
|
Akamai
|
Pittsburgh | United States | 2 IPs |
|
Akamai
|
Akamai
|
Las Vegas | United States | 4 IPs |
|
Akamai
|
Akamai
|
Montevideo | Uruguay | 2 IPs |
|
Akamai
|
Akamai
|
Silverdale | New Zealand | 1 IP |
|
Akamai
|
Akamai
|
Porto Alegre | Brazil | 1 IP |
|
Akamai
|
Akamai
|
Kansas City | United States | 1 IP |
|
Akamai
|
Akamai
|
Ancol | Indonesia | 1 IP |
|
Akamai
|
Akamai
|
Surabaya | Indonesia | 4 IPs |
|
Akamai
|
Akamai
|
Guayaquil | Ecuador | 1 IP |
|
Akamai
|
Akamai
|
Riga | Latvia | 2 IPs |
|
Akamai
|
Akamai
|
Barcelona | Spain | 6 IPs |
|
Akamai
|
Akamai
|
Arica | Chile | 1 IP |
|
Akamai
|
Akamai
|
Ho Chi Minh City | Vietnam | 2 IPs |
|
Akamai
|
Akamai
|
Hillsboro | United States | 5 IPs |
|
Akamai
|
Akamai
|
Yerevan | Armenia | 3 IPs |
|
Akamai
|
Akamai
|
Fujairah | United Arab Emirates | 6 IPs |
|
Akamai
|
Akamai
|
Kuala Lumpur | Malaysia | 2 IPs |
|
Akamai
|
Akamai
|
Ankara | Turkey | 4 IPs |
|
Akamai
|
Akamai
|
Nonthaburi | Thailand | 4 IPs |
|
Akamai
|
Akamai
|
Lucena | Philippines | 1 IP |
|
Akamai
|
Akamai
|
El Paso | United States | 3 IPs |
|
Akamai
|
Akamai
|
Edmonton | Canada | 1 IP |
|
Akamai
|
Akamai
|
Honolulu | United States | 2 IPs |
|
Akamai
|
Akamai
|
Cebu | Philippines | 1 IP |
|
Akamai
|
Akamai
|
Coimbatore | India | 1 IP |
|
Akamai
|
Akamai
|
Sunshine Coast | Australia | 1 IP |
|
Akamai
|
Akamai
|
Seongnam | South Korea | 1 IP |
|
Akamai
|
Akamai
|
Sofia | Bulgaria | 2 IPs |
|
Akamai
|
Shaw
|
Vancouver | Canada | 1 IP |
|
Akamai
|
LG Uplus
|
Seoul | South Korea | 8 IPs |
|
Akamai
|
Telstra
|
Melbourne | Australia | 3 IPs |
|
Akamai
|
Telstra
|
Sydney | Australia | 11 IPs |
|
Akamai
|
Chunghwa Telecom
|
Taipei | Taiwan | 5 IPs |
|
Akamai
|
Vocus
|
Brisbane | Australia | 6 IPs |
|
Akamai
|
Vocus
|
Sydney | Australia | 3 IPs |
|
Akamai
|
TPG Telecom
|
Sydney | Australia | 4 IPs |
|
Akamai
|
TPG Telecom
|
Brisbane | Australia | 3 IPs |
|
Akamai
|
Jio
|
Agra | India | 4 IPs |
|
Akamai
|
Jio
|
New Delhi | India | 5 IPs |
|
Akamai
|
Sparkle
|
Milan | Italy | 5 IPs |
|
Akamai
|
Sparkle
|
Rome | Italy | 2 IPs |
|
Akamai
|
Wind Tre
|
Rome | Italy | 5 IPs |
|
Akamai
|
Telmex
|
Santiago de Queretaro | Mexico | 6 IPs |
|
Akamai
|
Telmex
|
Mexico City | Mexico | 1 IP |
|
Akamai
|
TekSavvy
|
Toronto | Canada | 3 IPs |
|
Akamai
|
Fastweb
|
Milan | Italy | 1 IP |
|
Akamai
|
Telefonica
|
Madrid | Spain | 6 IPs |
|
Akamai
|
Telus
|
Vancouver | Canada | 6 IPs |
|
Akamai
|
Bite Lietuva
|
Vilnius | Lithuania | 4 IPs |
|
Akamai
|
Unitel
|
Ulaanbaatar | Mongolia | 4 IPs |
|
Akamai
|
Cox
|
Kansas City | United States | 3 IPs |
|
Akamai
|
Telia
|
Vilnius | Lithuania | 2 IPs |
|
Akamai
|
VNPT
|
Hanoi | Vietnam | 5 IPs |
|
Akamai
|
Digicel
|
Kingston | Jamaica | 4 IPs |
|
Akamai
|
Arelion
|
Helsinki | Finland | 3 IPs |
|
Akamai
|
AIS
|
Bangkok | Thailand | 2 IPs |
|
Akamai
|
RETN
|
Moscow | Russia | 1 IP |
|
Akamai
|
RETN
|
Kyiv | Ukraine | 4 IPs |
|
Akamai
|
Flo Networks
|
Reynosa | Mexico | 5 IPs |
|
Akamai
|
Flo Networks
|
Nogales | Mexico | 2 IPs |
|
Akamai
|
Taiwan Mobile
|
Taipei | Taiwan | 7 IPs |
|
Akamai
|
Angola Cables
|
Luanda | Angola | 2 IPs |
|
Akamai
|
Viettel
|
Ho Chi Minh City | Vietnam | 1 IP |
|
Akamai
|
Vodafone
|
Rome | Italy | 1 IP |
|
Akamai
|
Vodafone
|
Ankara | Turkey | 2 IPs |
|
Akamai
|
Aussie Broadband
|
Brisbane | Australia | 1 IP |
|
Akamai
|
Dimension Data
|
Randburg | South Africa | 2 IPs |
Other Locations
| CDN | Network | PoP | Location | IPs |
|---|---|---|---|---|
|
Cloudflare
|
Cloudflare
|
Core Network | United States | 1 IP |
|
Akamai
|
Akamai
|
Core Network | United States | 69 IPs |
|
Akamai
|
Akamai
|
Core Network | Colombia | 2 IPs |
|
Akamai
|
Akamai
|
Core Network | Australia | 1 IP |
|
Akamai
|
Akamai
|
Core Network | Brazil | 1 IP |
|
Akamai
|
Akamai
|
Core Network | United Kingdom | 4 IPs |
|
Akamai
|
Akamai
|
Core Network | Poland | 4 IPs |
|
Akamai
|
Akamai
|
Core Network | India | 1 IP |
|
Akamai
|
Akamai
|
Core Network | Singapore | 1 IP |
|
Akamai
|
Akamai
|
Core Network | Thailand | 5 IPs |
|
Akamai
|
Akamai
|
Core Network | Belgium | 1 IP |
|
Akamai
|
Akamai
|
Core Network | Philippines | 1 IP |
|
Akamai
|
Akamai
|
Core Network | Taiwan | 1 IP |
|
Akamai
|
Akamai
|
Core Network | Netherlands | 1 IP |
|
Akamai
|
ASN AS58511 | Core Network | Australia | 3 IPs |
|
Akamai
|
ASN AS17557 | Core Network | Pakistan | 36 IPs |
|
Akamai
|
ASN AS24186 | Core Network | India | 2 IPs |
|
Akamai
|
Jio
|
Core Network | India | 5 IPs |
|
Akamai
|
PLDT
|
Core Network | Philippines | 4 IPs |
|
Akamai
|
ASN AS38195 | Core Network | Australia | 1 IP |
|
Akamai
|
ASN AS17639 | Core Network | Philippines | 7 IPs |
|
Akamai
|
ASN AS38193 | Core Network | Pakistan | 3 IPs |
|
Akamai
|
ASN AS12400 | Core Network | Israel | 5 IPs |
|
Akamai
|
Swisscom
|
Core Network | Switzerland | 3 IPs |
|
Akamai
|
ASN AS30844 | Core Network | Mauritius | 4 IPs |
|
Akamai
|
ASN AS30844 | Core Network | Zimbabwe | 4 IPs |
|
Akamai
|
ASN AS41313 | Core Network | Bulgaria | 4 IPs |
|
Akamai
|
ASN AS9498 | Core Network | India | 1 IP |
|
Akamai
|
Taiwan Mobile
|
Core Network | Taiwan | 1 IP |
|
Akamai
|
ASN AS262197 | Core Network | Costa Rica | 2 IPs |
|
Akamai
|
ASN AS19429 | Core Network | Colombia | 4 IPs |
|
Akamai
|
LG Uplus
|
Core Network | South Korea | 1 IP |
|
Akamai
|
ASN AS4651 | Core Network | Thailand | 3 IPs |
|
Akamai
|
ASN AS9848 | Core Network | South Korea | 1 IP |
|
Akamai
|
ASN AS9930 | Core Network | Malaysia | 3 IPs |
|
Akamai
|
Sparkle
|
Core Network | Italy | 5 IPs |
|
Akamai
|
Telstra
|
Core Network | Australia | 6 IPs |
|
Akamai
|
ASN AS55824 | Core Network | India | 2 IPs |
|
Akamai
|
Arelion
|
Core Network | Sweden | 2 IPs |
|
Akamai
|
Telefonica
|
Core Network | Argentina | 2 IPs |
|
Akamai
|
RETN
|
Core Network | United Kingdom | 20 IPs |
|
Akamai
|
RETN
|
Core Network | Russia | 3 IPs |
|
Akamai
|
FPT Group
|
Core Network | Vietnam | 3 IPs |
|
Akamai
|
ASN AS21277 | Core Network | Iraq | 2 IPs |
|
Akamai
|
ASN AS3292 | Core Network | Denmark | 4 IPs |
|
Akamai
|
Viettel
|
Core Network | Vietnam | 1 IP |
|
Akamai
|
Vocus
|
Core Network | Australia | 4 IPs |
|
Akamai
|
ASN AS206206 | Core Network | Iraq | 2 IPs |
|
Akamai
|
ASN AS1680 | Core Network | United States | 1 IP |
|
Akamai
|
VNPT
|
Core Network | Vietnam | 1 IP |
|
Akamai
|
ASN AS2381 | Core Network | United States | 2 IPs |
|
Akamai
|
ASN AS34984 | Core Network | Turkey | 2 IPs |
|
Akamai
|
Vodafone
|
Core Network | Turkey | 2 IPs |
|
Akamai
|
ASN AS8697 | Core Network | Jordan | 3 IPs |
|
Akamai
|
Zain
|
Core Network | Bahrain | 2 IPs |
Netify Resources
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