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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to United Kingdom over time.
The largest autonomous systems registered to United Kingdom by IPv4 footprint.
United Kingdom against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.
Share of announced address space covered by valid Route Origin Authorizations.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 336 |
| AS212238GB | CDNEXT Datacamp Limited | 983K | 4,036 |
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| 0 |
| AS60945GB | VELOXSERV-LEGACY VeloxServ Communications Ltd | — | — | 0 |
| AS15635GB | YAHOO-UKL Yahoo-UK Limited | — | — | 0 |
| AS35375GB | CONSENSUSONE BITNIFTY LTD | — | — | 0 |
| AS43157GB | URBANWIMAX-NET Telcom Networks Limited | — | — | 0 |
| AS50871GB | IXBRADFORD IXBRADFORD LIMITED | — | — | 0 |
| AS206987GB | MARCUSNAW Marcus Nawrocki | — | — | 0 |
| AS209869GB | OLLIES_CLOUD Ollie's Cloud LTD | — | — | 0 |
| AS44874GB | VORBOSS-RD Vorboss Limited | — | — | 0 |
| AS211393GB | VITRIFINET Vitrifi Limited | — | — | 0 |
| AS213262GB | Moe-Network Moe Overflow Electric Limited | — | 21 | 5 |
| AS215071GB | SERVERSWITCH Server Switch Limited | — | — | 0 |
| AS43006GB | DIGITAL-REALTY-IE Digital Realty (UK) Limited | — | — | 0 |
| AS216116GB | vivoenergy-as Vivo Energy Ltd | — | — | 0 |
| AS6675GB | COLT-FRANCE-AS COLT Technology Services Group Limited | — | — | 0 |
| AS43198GB | OUTSOURCERY-AS GCI Network Solutions Limited | — | — | 0 |
| AS31398GB | NEC-EU-AS NEC Europe LTD | — | — | 0 |
| AS44366GB | DATACASH-AS MASTERCARD PAYMENT GATEWAY SERVICES GROUP LIMITED | — | — | 0 |
| AS49396GB | LLWYNYGORRAS Llwynygorras Cyf | — | — | 0 |
| AS52037GB | y-internet Blackbridge Limited | — | — | 0 |