Every IP address has its Backname™.

• 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 hyphens

• 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 hyphens*