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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 | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,120 |
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| AS202455GB | CUSHWAKE-NL Cushman & Wakefield Debenham Tie Leung Limited | — | — | 0 |
| AS200469GB | FEMSTIOSROX-AS FEMSTIOSROX LTD | — | — | 0 |
| AS214705GB | Jamf JAMF LTD | — | — | 0 |
| AS198657GB | GOHEGAN-NET Kai Gohegan | — | 257 | 2 |
| AS5519GB | Wavenet-AS5519 Wavenet Limited | — | — | 0 |
| AS212426GB | FWNETWORKS-AS Hey Broadband LTD | — | — | 0 |
| AS212479GB | RaziNetwork RAZINETWORK LTD | — | — | 0 |
| AS44008GB | RBKC Royal Borough of Kensington and Chelsea | — | — | 0 |
| AS43878GB | EUROPE-CONNECTED Clouvider Limited | — | — | 0 |
| AS39295GB | SWIP-AS Southern Communications Ltd | — | — | 0 |
| AS212391GB | CentralNic-Anycast-K CentralNic Ltd | — | — | 0 |
| AS209149GB | SEEKAHOST SEEKAHOST LTD | — | — | 0 |
| AS209035GB | TITANIUM PRT Systems Limited | — | — | 0 |
| AS13017GB | CABLE-AND-WIRELESS VODAFONE ENTERPRISE EQUIPMENT LIMITED | — | — | 0 |
| AS211591GB | AS_ANYCAST Free Range Cloud Ltd. | — | — | 0 |
| AS47871GB | ASNMGL Newsquest Media Group Ltd | — | — | 0 |
| AS212244GB | IP6net IP6net Ltd | — | — | 0 |
| AS52167GB | BANDWIDTH-USA Hydra Communications Ltd | — | — | 0 |
| AS40986GB | YAHOO1-AS Yahoo-UK Limited | — | — | 0 |
| AS215071GB | SERVERSWITCH Server Switch Limited | — | — | 0 |
| AS215474GB | BIIL-RU-AS BIIL RU LTD | — | — | 0 |
| AS25376GB | NETNORTH-ASN Netnorth Limited | — | — | 0 |
| AS35528GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS25041GB | AWS-DX British Telecommunications PLC | — | — | 0 |
| AS8802GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS12953GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS209838GB | HELLOWORLD Hello World Ltd | — | — | 0 |
| AS21493GB | PKXGEU GTT - EMEA Ltd. | — | — | 0 |
| AS214665GB | PROJECT-PC Adam Beddall | — | — | 0 |
| AS213863GB | SmartIXPRouteServers SMARTNET LIMITED | — | — | 0 |
| AS212857GB | fibreway Fibreway Limited | — | — | 0 |
| AS213660GB | elisamurphy Elisa Murphy | — | — | 0 |
| AS201799GB | CISCO-CAAS-EU Cisco International Limited | — | — | 0 |
| AS211178GB | DIGITALINFRA-AS Full Fibre Limited | — | — | 0 |
| AS202370GB | HSX-AZ Hiscox Underwriting Group Services Ltd | — | — | 0 |
| AS43157GB | URBANWIMAX-NET Telcom Networks Limited | — | — | 0 |
| AS206509GB | KCOM-UK-AS KCOM Group Limited | — | — | 0 |
| AS206136GB | CLOUDSRV-NORTH Clouvider Limited | — | — | 0 |
| AS63022GB | IIX-SCIIX-RS - IX Reach Ltd | — | — | 0 |
| AS206036GB | DRT-EXCHANGE Digital Realty (UK) Limited | — | — | 0 |
| AS201762GB | RBK-AS Royal Borough of Kingston Council | — | — | 0 |
| AS59581GB | GB-LANCSCC-2 Lancashire County Council | — | — | 0 |
| AS51526GB | IXLEEDS IXLeeds Limited | — | — | 0 |
| AS205441GB | LUMO Lumo Cloud Limited | — | — | 0 |
| AS198372GB | wowfi-as Futility Ltd | — | — | 0 |
| AS197976GB | FAVBET-AS Favbet Invest LLP | — | — | 0 |