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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 |
| — |
| 257 |
| 2 |
| AS213074GB | IPXO-Testing-ASN Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS205897GB | HOSTOWEB HOSTOWEB LTD | — | — | 0 |
| AS206925GB | CentralNic-GRX-A CentralNic Ltd | — | — | 0 |
| AS211787GB | Rolosoft-Ltd Rolosoft Limited | — | — | 0 |
| AS47718GB | IMSHealth IQVIA SOLUTIONS HQ LTD | — | — | 0 |
| AS49396GB | LLWYNYGORRAS Llwynygorras Cyf | — | — | 0 |
| AS215071GB | SERVERSWITCH Server Switch Limited | — | — | 0 |
| AS214705GB | Jamf JAMF LTD | — | — | 0 |
| AS213202GB | The-Cloud-Systems-Group Cloudnet Computing Ltd | — | — | 0 |
| AS44366GB | DATACASH-AS MASTERCARD PAYMENT GATEWAY SERVICES GROUP LIMITED | — | — | 0 |
| AS206202GB | NAMESERVERPARTY-AS Faelix Limited | — | 1 | 1 |
| AS208784GB | ASTLRK TELROCK SYSTEMS LIMITED | — | — | 0 |
| AS206918GB | DWP Department for Work and Pensions | — | — | 0 |
| AS207602GB | EA-CH-GENEVA Electronic Arts Limited | — | — | 0 |
| AS50461GB | CITYTELECOM City Telecom LTD | — | — | 0 |
| AS211708GB | Callum_Cardy Callum Cardy | — | — | 0 |
| AS209230GB | SERVERNET-ASv SERVERNET INTERNET LIMITED | — | — | 0 |
| AS203075GB | ORG-LFL9-RIPE LocalLink Fibre Ltd | — | — | 0 |
| AS212806GB | stratagem VeloxServ Communications Ltd | — | 64 | 1 |
| AS34406GB | VANCO-UK-AS2 Flag Telecom UK Limited | — | — | 0 |
| AS215363GB | Wles Wles Technologies Ltd | — | 257 | 2 |
| AS34079GB | EDUSERV-AS Jisc Services Limited | — | — | 0 |
| AS214665GB | PROJECT-PC Adam Beddall | — | — | 0 |
| AS213863GB | SmartIXPRouteServers SMARTNET LIMITED | — | — | 0 |
| AS212475GB | COMCAST-UK Comcast International Holdings UK Limited | — | — | 0 |
| AS5622GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS39530GB | parker James Parker | — | — | 0 |
| AS48910GB | INAP-FRA PACKETFABRIC (UK) LTD | — | — | 0 |
| AS24673GB | FIRSTSERV-AS Six Degrees Technology Group Limited | — | — | 0 |
| AS202194GB | HORDEN-ENGINEERING Horden Engineering Limited | — | 1 | 1 |
| AS30746GB | NAT-MORRIS Nat Morris | — | — | 0 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS8844GB | COMMUNITY GTT - EMEA Ltd. | — | — | 0 |
| AS215963GB | torin Torin Storkey | — | — | 0 |
| AS215754GB | FIBREWAVE-CUST Fiberwave Broadband Ltd | — | — | 0 |
| AS201432GB | Caleycom Converged Communication Solutions Limited | — | — | 0 |
| AS204000GB | YAHOO-LOB Yahoo-UK Limited | — | — | 0 |
| AS213543GB | JONES-LAB Alexander Jones | — | 1 | 1 |
| AS43838GB | Education-Bradford City of Bradford Metropolitan District | — | — | 0 |
| AS60934GB | IXBRADFORD IXBRADFORD LIMITED | — | — | 0 |
| AS62267GB | NET365 Talk Straight Ltd. | — | — | 0 |
| AS197419GB | IISS International Institute For Strategic Studies | — | — | 0 |
| AS201280GB | five9uk FIVE9 INC UK LIMITED | — | — | 0 |
| AS199052GB | AS-AQUAHOST AquaHost LTD | — | — | 0 |
| AS199228GB | IHOR-AS IHOR HOSTING LTD | — | — | 0 |
| AS208485GB | PINHOUSE-AS PINHOUSE LIMITED | — | 1 | 1 |