|Platform||Android, IOS, Windows, macOS|
18.104.22.168 is a free Domain Name System (DNS) service by American company Cloudflare in partnership with APNIC. The service functions as a recursive name server providing domain name resolution for any host on the Internet. The service was announced on April 1, 2018. On November 11, 2018, Cloudflare announced a mobile application of their 22.214.171.124 service for Android and iOS. On September 25, 2019, Cloudflare released WARP, an upgraded version of their original 126.96.36.199 mobile application.
The 188.8.131.52 DNS service operates recursive name servers for public use at the four following IP addresses. The addresses are mapped to the nearest operational server by anycast routing. The DNS service is also available for Tor clients. Users can set up the service by manually changing their DNS resolvers to the IP addresses below. Mobile users on both Android and iPhone have the alternative of downloading the 184.108.40.206 mobile application, which automatically configures the DNS resolvers on the device.
|220.127.116.11 (Mainstream)||18.104.22.168 for Families|
|DNS filtering||No||Yes, malware blocking only||Yes, malware and adult content blocking|
|DoH address||https://cloudflare-dns.com/dns-query||https://security.cloudflare-dns.com/dns-query[permanent dead link]||https://family.cloudflare-dns.com/dns-query[permanent dead link]|
22.214.171.124 is a recursive DNS resolver. Cloudflare runs an authoritative DNS resolver with a network of over 20 million Internet properties. With the recursor and the resolver on the same network, some DNS queries can be answered directly.[third-party source needed]
With the release of the 126.96.36.199 mobile application in November 2018, Cloudflare added the ability for users to encrypt their DNS queries over HTTPS (DoH) or TLS (DoT). Later on, a VPN tunnel based on WireGuard was implemented.
Prior usage of the IP address
Technology websites noted that by using 188.8.131.52 as the IP address for its service, Cloudflare exposed misconfigurations in existing setups that violated Internet standards (such as RFC1918). 184.108.40.206 was not a reserved IP address, yet was abused by many existing routers (mostly those sold by Cisco Systems) and companies for hosting login pages to private networks, exit pages or other purposes, rendering the proper routing of 220.127.116.11 impossible on those systems. Additionally, 18.104.22.168 is blocked on many networks and by multiple ISPs because the simplicity of the address means that it was previously often used inappropriately for testing purposes and not legitimate use. These previous uses have led to a huge influx of garbage data to Cloudflare's servers.
Cleanup of 22.214.171.124 and 126.96.36.199
The 188.8.131.52/8 IP block was assigned in 2010 to APNIC; before this time it was unassigned space. An unassigned IP space, however is not the same as a reserved IP space for private use (called a reserved IP address). For example, AT&T has said it is working on fixing this issue within its CPE hardware.
184.108.40.206 was built as an alternative to the default DNS resolvers from Internet Service Providers (ISP). Since most internet queries require a DNS resolver in order to translate a text-based web address to a numerical IP address, DNS resolvers hold a lot of data on its users. Owners of DNS services, such as an ISP, are able to track exactly which domains a user visits. Cloudflare's 220.127.116.11 markets itself as the antithesis to these traditional DNS resolvers. The service claims to adhere to the following privacy principles: 
- Don't write user-identifiable log data to disk;
- Never sell browsing data or use it in any way to target users with advertising data;
- Do not collect any personal information — name, phone number, or email address;
- Regularly hire outside auditors to ensure the service adheres to these promises.
- APNIC Labs enters into a research agreement with Cloudflare, Geoff Huston, APNIC Blog, April 2, 2018
- Cloudflare launches 18.104.22.168 DNS service that will speed up your internet The Verge, April 1, 2018
- Cimpanu, Catalin. "Cloudflare launches Android and iOS apps for its 22.214.171.124 service | ZDNet". ZDNet.
- "WARP is here (sorry it took so long)". The Cloudflare Blog. September 25, 2019. Retrieved November 20, 2019.
- Setting Up 126.96.36.199 Speed
- Introducing DNS Resolver, 188.8.131.52 (not a joke) DNS resolver, 184.108.40.206, is served by Cloudflare’s Global Anycast Network.
- "Introducing DNS Resolver for Tor". Cloudflare. June 5, 2018. Retrieved October 1, 2018.
- 220.127.116.11. "18.104.22.168 — The free app that makes your Internet faster". 22.214.171.124. Retrieved November 22, 2019.CS1 maint: numeric names: authors list (link)
- "Does 126.96.36.199 do web content filtering like Cisco's OpenDNS?". Cloudflare Community. November 11, 2018. Retrieved November 1, 2020.
- "Introducing 188.8.131.52 for Families". The Cloudflare Blog. April 1, 2020. Retrieved November 1, 2020.
- "Making requests". The Cloudflare Blog. Retrieved October 6, 2020.
- "Introducing Warp: Fixing Mobile Internet Performance and Security". The Cloudflare Blog. April 1, 2019. Retrieved November 22, 2019.
- "The Technical Challenges of Building Cloudflare WARP". The Cloudflare Blog. September 25, 2019. Retrieved November 22, 2019.
- Cherry, Denny (April 5, 2018). "5 reasons Cloudflare's roll-out of 184.108.40.206 has been a disaster". Tech Target. Archived from the original on April 26, 2018. Retrieved April 26, 2018.
- "220.127.116.11: Cloudflare's new DNS attracting 'gigabits per second' of rubbish". ZDNet. April 4, 2018. Retrieved April 26, 2018.
- "1/8 and 27/8 allocated to APNIC". NANOG. January 21, 2010. Retrieved May 3, 2018.
- List of assigned /8 IPv4 address blocks
- Fixing reachability to 18.104.22.168, GLOBALLY!, by Marty Strong, April 10, 2018
- "Tweet by @billplein, 3 April 2018".
- "DNS-Privacy: Google schiebt DNS-over-TLS an". c't Magazin – Heise Online (in German). Retrieved January 11, 2021.
- Khalid, Amrita (April 2, 2019). "Cloudflare's privacy-focused DNS app adds a free VPN". Engadget. Archived from the original on April 2, 2019. Retrieved April 2, 2019.
- Humphries, By Matthew; September 26, 2019 10:18AM EST; September 26, 2019. "Cloudflare Finally Launches Warp, But It's Not a Mobile VPN". PCMAG. Retrieved September 27, 2019.CS1 maint: numeric names: authors list (link)