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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 | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 968.4K | 3,979 |
| — |
| 16 |
| 1 |
| AS215368GB | CONNORMCF Connor McFarlane | — | 1 | 1 |
| AS207965GB | ETIENNE-LABAUME ETIENNE LABAUME | — | 13 | 3 |
| AS200299GB | BASESERV-AS BaseServ Limited | — | 1 | 1 |
| AS202627GB | CARBONDNS Fika Studio Limited | — | 1 | 1 |
| AS213447GB | The-Aster-Institute-of-Education ASTER GLOBAL CO. LTD | — | 1 | 1 |
| AS47326GB | KTT-CARRIER-ASN KTT Carrier Limited | — | 65.6K | 3 |
| AS34202GB | CLOUVIDER-THN2 Clouvider Limited | — | 1 | 1 |
| AS205648GB | VirgoCube_Limited VirgoCube Limited | — | 256 | 1 |
| AS202194GB | HORDEN-ENGINEERING Horden Engineering Limited | — | 1 | 1 |
| AS215002GB | PRISMGG PRISM.GG Limited | — | 80 | 2 |
| AS200365GB | Possibly-Lizards Possibly Lizards Limited | — | 257 | 2 |
| AS59920GB | LUSORY Lusory Limited | — | 1 | 1 |
| AS199688GB | CRITPERF-AS Critical Perfect Ltd | — | 16 | 1 |
| AS215332GB | SNIFF122-AS Lewis Foster | — | 1 | 1 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS213897GB | BUBBLES-AS BUBBLES ALTER LIMITED | — | 1 | 1 |
| AS212857GB | fibreway Fibreway Limited | — | — | 0 |
| AS206900GB | APLNET Applecross Community Company | — | — | 0 |
| AS208886GB | RIPL-AS Rhodes Island Pharmaceutical Ltd | — | — | 0 |
| AS213265GB | RSRUK NEO NEXT + ENERGY RESOURCES UK LIMITED | — | — | 0 |
| AS13218GB | INNOVISE-AS WorkWave UK LTD | — | — | 0 |
| AS29026GB | CTAYLOR-AS CHARLES TAYLOR LIMITED | — | — | 0 |
| AS28816GB | CHESS-ICT-MAN Chess ICT Ltd | — | — | 0 |
| AS44874GB | VORBOSS-RD Vorboss Limited | — | — | 0 |
| AS59736GB | JETSTREAM JetStream England Limited | — | — | 0 |
| AS204446GB | HELLOMOUSE Hellomouse Ltd | — | 5 | 5 |
| AS35196GB | IH-TRANSIT-AS FIRST SERVER LIMITED | — | 65.5K | 2 |
| AS41255GB | Alanyhq-Networks-AS Alanyhq Networks Limited | — | 1 | 1 |
| AS204293GB | TinyHomeLab TinyHomeLab Ltd | — | 1 | 1 |
| AS214931GB | ALUE-NET ALUE NETWORK LIMITED | — | 1 | 1 |
| AS209808GB | LUKE Luke James | — | 64 | 1 |
| AS205474GB | CARR Jack Carr | — | 1 | 1 |
| AS207067GB | Gigasonic Commsworld Ltd | — | 65.5K | 1 |
| AS211224GB | JB3 Joseph Banks | — | 17 | 2 |
| AS204375GB | Adam-Goodenough Adam Goodenough | — | 17 | 2 |
| AS204789GB | BizbetaLTD BIZBETA LTD | — | 68.9K | 18 |
| AS211966GB | BEN-HOUGHTON Ben Houghton | — | — | 0 |
| AS213673GB | WAISE-AS WAISE EUROPE LTD | — | 320 | 5 |
| AS58339GB | MARIA-AS MARIA STYLE LTD | — | 704 | 33 |
| AS215768GB | Infected-Systems Alex Haydock | — | 1 | 1 |
| AS205383GB | PERRYNET Rhys Perry | — | 1 | 1 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 4 | 4 |
| AS214731GB | ETO-AS ETO Networks Limited | — | 633 | 43 |
| AS200754GB | SHADOWRHYTHM-AS SHADOWRHYTHM LIMITED | — | 3 | 3 |
| AS210338GB | PIXSAL-AS Kieran Breeze | — | 3 | 3 |
| AS207529GB | NyanLoliNetwork NYANLOLI LTD | — | 67 | 19 |