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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
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| AS42987GB | O2Business Virgin Media Limited | — | — | 0 |
| AS199208GB | EY-DE-NGDC-2 EY Global Services Limited | — | — | 0 |
| AS201576GB | Hoofe-Net Aidan Reynolds-Hoofe | — | — | 0 |
| AS43006GB | DIGITAL-REALTY-IE Digital Realty (UK) Limited | — | — | 0 |
| AS203074GB | NOTICOR Ashley Primo | — | — | 0 |
| AS201266GB | AtBristol We The Curious Limited | — | — | 0 |
| AS204585GB | SHANEMCC-EVENTS ShaneMcC Ltd | — | — | 0 |
| AS215002GB | PRISMGG PRISM.GG Limited | — | 80 | 2 |
| AS39139GB | Menzies-Aviation-PLC-AS Menzies Aviation Plc | — | — | 0 |
| AS213863GB | SmartIXPRouteServers SMARTNET LIMITED | — | — | 0 |
| AS201335GB | SEVENNET-UK Seven Networking UK Ltd | — | 4 | 4 |
| AS60036GB | DYFED-IT-SOLUTIONS Voneus Ltd | — | — | 0 |
| AS61135GB | TR-SUNUCUCOM TIGOVA NETWORK LIMITED | — | — | 0 |
| AS206976GB | KADFIRE Kadfire Limited | — | — | 0 |
| AS200174GB | AS_WISPEED Wispeed LTD | — | — | 0 |
| AS206136GB | CLOUDSRV-NORTH Clouvider Limited | — | — | 0 |
| AS210396GB | broadwaypartners Voneus Ltd | — | — | 0 |
| AS34158GB | BBC-RD-NONUK-AS BBC | — | — | 0 |
| AS212265GB | NCL-IX Stellium Networks Limited | — | — | 0 |
| AS218282GB | WESTTECH-AS WESTTECH LTD | — | — | 0 |
| AS43157GB | URBANWIMAX-NET Telcom Networks Limited | — | — | 0 |
| AS213767GB | RH Richard Humphries | — | 1 | 1 |
| AS8802GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS21493GB | PKXGEU GTT - EMEA Ltd. | — | — | 0 |
| AS43251GB | SURFCONTROL-READING Forcepoint Overseas Limited | — | — | 0 |
| AS209601GB | XiaoYuanNET XiaoYuan Networks Limited | — | 6 | 6 |
| AS44218GB | CTBY-ASN China Telecom Europe Ltd. | — | — | 0 |
| AS201930GB | ASN-TVAT VERTALA LTD | — | — | 0 |
| AS8546GB | YOUR-COMMS-UK-AS Vodafone Limited | — | — | 0 |
| AS12852GB | EASYNETES-AS GTT - EMEA Ltd. | — | — | 0 |
| AS213543GB | JONES-LAB Alexander Jones | — | 1 | 1 |
| AS33408GB | WHG-SPARE-1 - World Host Group | — | — | 0 |
| AS42902GB | GLOBECONNECT Clouvider Limited | — | — | 0 |
| AS59705GB | POBOX2-AS Acora Limited | — | — | 0 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS60714GB | TELNA-UK TELNA (UK) LTD | — | — | 0 |
| AS200639GB | Cross-Computing-Services Cross Computing Services Limited | — | — | 0 |
| AS49999GB | BANDWIDTHTECH-AS Hydra Communications Ltd | — | — | 0 |
| AS202953GB | ukavisbudgetgroup Avis Budget Services Ltd. | — | — | 0 |
| AS209035GB | TITANIUM PRT Systems Limited | — | — | 0 |
| AS211036GB | LSYS1 Nathan James | — | — | 0 |
| AS213626GB | BIONIC-NETWORK Bionic.Network Ltd | — | 2 | 2 |
| AS212295GB | HEYBAS2 Hey Broadband LTD | — | — | 0 |
| AS212479GB | RaziNetwork RAZINETWORK LTD | — | — | 0 |
| AS12576GB | EE EE Limited | — | — | 0 |
| AS205474GB | CARR Jack Carr | — | 1 | 1 |