HMRC-AS His Majesty's Revenue and Customs
| Pays | Royaume-Uni |
| Autonomous System (approximatif) | AS204222 |
Blocs IP
| Version | Bloc | Pays | Description | Remarques | Création | RIR |
|---|---|---|---|---|---|---|
| IPv4 | 163.171.0.0/18 (163.171.0.0 - 163.171.63.255) | Royaume-Uni | * | * | 14/02/1992 00:00:00 | RIPENCC |
| IPv6 | 2a01:5820::/32 (2a01:5820:: - 2a01:5820:ffff:ffff:ffff:ffff:ffff:ffff) | Royaume-Uni | * | * | 19/06/2015 00:00:00 | RIPENCC |