Backname is a DNS server that gives every IP address its very own domain:
- 142.250.147.138.backname.io resolves to 142.250.147.138
IPv4 with dots - 127-0-0-1.backname.io resolves to 127.0.0.1
IPv4 with dashes - 2a00.1450.401b.810.0.0.0.200e.backname.io resolves to 2a00:1450:401b:810::200e
IPv6 with dots - 0--1.backname.io resolves to ::1
IPv6 with dashes
The service is live publicly and for free over at backname.io, but feel free to host your own instance if you wish.