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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.
3,132 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
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| AS210338GB | PIXSAL-AS Kieran Breeze | — | 3 | 3 |
| AS51805GB | cantab Gam Systematic LLP | — | — | 0 |
| AS44402GB | GFINET-AS GFI Holdings Limited | — | — | 0 |
| AS49738GB | NETROX-AS 3nt solutions LLP | — | — | 0 |
| AS34846GB | ccore-as NEWS CORP UK & IRELAND LIMITED | — | — | 0 |
| AS34413GB | Matrix Chess Limited | — | — | 0 |
| AS8576GB | CW-ASPAC Vodafone Limited | — | — | 0 |
| AS206637GB | IQIP-AS CSL (DualCom) Limited | — | — | 0 |
| AS201335GB | SEVENNET-UK Seven Networking UK Ltd | — | 4 | 4 |
| AS60788GB | VARIDION Gamma Network Solution Limited | — | — | 0 |
| AS214018GB | IIC-AS INTERNET INTELLIGENCE COMPANY LTD | — | 1 | 1 |
| AS207200GB | Krisdev Kristian Hoyle-Johnson | — | — | 0 |
| AS201930GB | ASN-TVAT VERTALA LTD | — | — | 0 |
| AS201729GB | VALE-AS VALERUS LTD | — | — | 0 |
| AS200099GB | ASN-EXTLIKES Extlikes UK Marketing Limited | — | — | 0 |
| AS202953GB | ukavisbudgetgroup Avis Budget Services Ltd. | — | — | 0 |
| AS212232GB | BGPTOOLS Port 179 LTD | — | 4 | 4 |
| AS35736GB | WUK-AS EE Limited | — | — | 0 |
| AS25346GB | Tiscali-AS TalkTalk Communications Limited | — | — | 0 |
| AS33408GB | WHG-SPARE-1 - World Host Group | — | — | 0 |
| AS8546GB | YOUR-COMMS-UK-AS Vodafone Limited | — | — | 0 |
| AS209606GB | BEYONDORBIT Beyond Orbit Ltd. | — | 3 | 3 |
| AS213756GB | MACARNE Macarne Limited | — | — | 0 |
| AS213526GB | SECURY SECURY INFORMATION TECHNOLOGIES LTD | — | — | 0 |
| AS210277GB | IPXO Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS44110GB | WALSALL Walsall Metropolitan Borough Council | — | — | 0 |
| AS206792GB | ZACH Zachary Buller | — | 16 | 1 |
| AS52037GB | y-internet Blackbridge Limited | — | — | 0 |
| AS214602GB | DATACENTER-CLUSTER-FL-AS FIRST SERVER LIMITED | — | 65.5K | 1 |
| AS50445GB | WIREFAST Wirefast Limited | — | — | 0 |
| AS43367GB | IWEB-HOSTING Interactive Web Solutions Ltd | — | — | 0 |
| AS43198GB | OUTSOURCERY-AS GCI Network Solutions Limited | — | — | 0 |
| AS50461GB | CITYTELECOM City Telecom LTD | — | — | 0 |
| AS47584GB | STELIA Stelia Ltd | — | — | 0 |
| AS49999GB | BANDWIDTHTECH-AS Hydra Communications Ltd | — | — | 0 |
| AS33898GB | TMOBILE-AS EE Limited | — | — | 0 |
| AS207039GB | SAC-AS Satellite Applications Catapult Limited | — | — | 0 |
| AS25041GB | AWS-DX British Telecommunications Limited | — | — | 0 |
| AS213863GB | SmartIXPRouteServers SMARTNET LIMITED | — | — | 0 |
| AS213660GB | elisamurphy Elisa Murphy | — | — | 0 |
| AS212391GB | CentralNic-Anycast-K CentralNic Ltd | — | — | 0 |
| AS41393GB | NASSTAR-AS GCI Network Solutions Limited | — | — | 0 |
| AS148971GB | KEIBIIN-AS-AP - Keibiin's Holdings Limited | — | 313 | 13 |
| AS203438GB | RGSL Regus Group Services Ltd | — | — | 0 |
| AS45828GB | WORLDREACH Hello World Ltd | — | — | 0 |
| AS201696GB | SHAMILNET Shamil Nunhuck | — | — | 0 |