127.0.0.1
IPv4 loopback address
The conventional IPv4 loopback address — "localhost". The whole 127.0.0.0/8 block loops back to the local host (RFC 1122).
Similar magic numbers
| value | name | category |
|---|---|---|
| -1 | Universal error/EOF sentinel | sentinel |
| 07 | Generic drawing programs | file-signature |
| 04 | dBASE IV file | file-signature |
| 03 | MapInfo Native Data Format / dBASE III file | file-signature |
| 08 | dBASE IV or dBFast configuration file | file-signature |