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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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| 0 |
| AS59893GB | FRC-AS Free Range Cloud Ltd. | — | 4 | 4 |
| AS56739GB | DICO PRT Systems Limited | — | — | 0 |
| AS45828GB | WORLDREACH Hello World Ltd | — | — | 0 |
| AS50697GB | ACSN-AS Reliance Cyber Ltd | — | — | 0 |
| AS62273GB | IXMIDLANDS-ROUTESRV SRVNET LTD | — | — | 0 |
| AS61135GB | TR-SUNUCUCOM TIGOVA NETWORK LIMITED | — | — | 0 |
| AS49738GB | NETROX-AS 3nt solutions LLP | — | — | 0 |
| AS199111GB | GC-NET GRAND CYAN LTD | — | — | 0 |
| AS198768GB | OASISINFO-AS OASIS INFOTECH LIMITED | — | 2 | 2 |
| AS201258GB | CRYPTIDZ Chaos Cupit | — | — | 0 |
| AS206792GB | ZACH Zachary Buller | — | 16 | 1 |
| AS34158GB | BBC-RD-NONUK-AS BBC | — | — | 0 |
| AS39179GB | NASSTAR-TRANSIT-AS GCI Network Solutions Limited | — | — | 0 |
| AS211209GB | EUROPEANEDGE-IX AIRBYTES COMMUNICATIONS Limited | — | — | 0 |
| AS208533GB | CSSUK Clear Street Services UK LTD | — | — | 0 |
| AS8576GB | CW-ASPAC Vodafone Limited | — | — | 0 |
| AS213729GB | RikkiNet Rikki Network Limited | — | 1 | 1 |
| AS201930GB | ASN-TVAT VERTALA LTD | — | — | 0 |
| AS200639GB | Cross-Computing-Services Cross Computing Services Limited | — | — | 0 |
| AS201690GB | CallWithMe-AS CALLWITHME LTD. | — | — | 0 |
| AS197872GB | EA-NL-AMSTERDAM_DC Electronic Arts Limited | — | — | 0 |
| AS204660GB | Tiger-Technologies-Limited Tiger Technologies Limited | — | 1 | 1 |
| AS15845GB | CitC_IRS_Service_AS15845 Computers in the City Ltd | — | — | 0 |
| AS9156GB | BBC-TRANSIT BBC | — | — | 0 |
| AS216324GB | HYPERGROUP-NET - Hyper Group Network Ltd. | — | — | 0 |
| AS30897GB | Pentagon-Systems RDS Global Limited | — | — | 0 |
| AS215002GB | PRISMGG PRISM.GG Limited | — | 80 | 2 |
| AS60912GB | VPLAB VPLAB LTD | — | — | 0 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS60120GB | CDS-EMEA Cardinia Real Estate UK Limited | — | — | 0 |
| AS34649GB | HOST365 HOST365 LIMITED | — | — | 0 |
| AS31716GB | AS31716 Qube Research and Technologies Limited | — | — | 0 |
| AS16162GB | LONDONWEB London Web Ltd | — | — | 0 |
| AS43198GB | OUTSOURCERY-AS GCI Network Solutions Limited | — | — | 0 |
| AS213803GB | AS-Xray Xray Network Ltd | — | — | 0 |
| AS5428GB | ECL-AS VODAFONE ENTERPRISE EQUIPMENT LIMITED | — | — | 0 |
| AS213546GB | AS_QUICK_BYTES Quick Bytes LTD | — | — | 0 |
| AS215913GB | NetLab Chun Ming Ou | — | — | 0 |
| AS25376GB | NETNORTH-ASN Netnorth Limited | — | — | 0 |
| AS25041GB | AWS-DX British Telecommunications PLC | — | — | 0 |
| AS8802GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS12471GB | TelstraEuropeLtd-DEDICATED-HOSTING TELSTRA UK LIMITED | — | — | 0 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS212931GB | OSCARMUSICRAND Oscar Music & Media Ltd. | — | — | 0 |
| AS212391GB | CentralNic-Anycast-K CentralNic Ltd | — | — | 0 |
| AS212475GB | COMCAST-UK Comcast International Holdings UK Limited | — | — | 0 |