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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 |
| 256 |
| — |
| 1 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS206981GB | TeritumDevelopment Christopher Mountford | 256 | 1 | 2 |
| AS215172GB | JIANYUELAB-AS JIANYUELAB LTD | 256 | 65.7K | 15 |
| AS207536GB | SEABECKSOLUTIONS-AS SEABECK SOLUTIONS LIMITED | 256 | — | 1 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS16351GB | JUNO-AS George Vorres | 256 | — | 1 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS204024GB | GRIFFINBANK Griffin Bank Ltd | 256 | 1 | 2 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS213434GB | GALACTIX Rhys Woolcott | 256 | 18 | 4 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS49728GB | HEREFORDSHIRE-COUNCIL Herefordshire Council | 256 | — | 1 |
| AS204979GB | LINX-SCO1 London Internet Exchange Ltd. | 256 | 1 | 2 |
| AS215672GB | MoeChuang-Network MoeChuang Network Limited | 256 | 16 | 2 |
| AS219115GB | TropicalHOST TROPICAL HOSTING LTD | 256 | 16 | 2 |
| AS198243GB | GlobalEntry-AS GLOBAL ENTRY SOLUTIONS LTD | 256 | — | 1 |
| AS207846GB | Lauren-Kelly Lauren Renee Kelly | 256 | 1 | 2 |
| AS207549GB | AS207549 TheFinnaCompany Ltd | 256 | — | 1 |
| AS206530GB | VOXYONDER VOXYONDER NETWORK SERVICES UK LTD | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS207067GB | Gigasonic Commsworld Ltd | 256 | 65.5K | 2 |
| AS57770GB | ECHOINTERNET Echo Internet Limited | 256 | — | 1 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS12613GB | FIREBRICK-AS Firebrick Limited | 256 | — | 1 |
| AS42359GB | WEMBLEY-AS The Football Association Ltd. | 256 | — | 1 |
| AS24894GB | TAGWORLDWIDE Tag Europe Ltd | 256 | — | 1 |
| AS48628GB | CoreISP CoreISP Group Limited | 256 | 524.3K | 2 |
| AS60431GB | PNO-AS PNO Solutions Limited | 256 | 49 | 5 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS197166GB | GOTSCHNA-AS Gotschna Limited | 256 | 2 | 3 |
| AS218393GB | FSL-SOFTWARE FSL Software Ltd | 256 | — | 1 |
| AS210025GB | XXSL Alice Cat Research Ltd | 256 | 10 | 11 |
| AS219040GB | BREEZENODES Breezenodes Ltd | 256 | 3 | 4 |
| AS211198GB | WHITESPIDER WhiteSpider Enterprise Services Limited | 256 | — | 1 |
| AS203961GB | CentralNic-Anycast-G CentralNic Ltd | 256 | 1 | 2 |
| AS209999GB | ARL Ascot Racecourse Ltd | 256 | — | 1 |
| AS206773GB | MSXI MSX International Ltd | 256 | — | 1 |
| AS218513GB | STPD-NETWORK Joshua Noakes | 256 | 2 | 3 |
| AS198466GB | MORBY J. MORBY | 256 | — | 1 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS47578GB | PRT-ANYCAST PRT Systems Limited | 256 | 1 | 2 |
| AS57138GB | DOH-MULLVAD LOCIX LIMITED | 256 | 65.5K | 2 |
| AS49209GB | CTE-ASN China Telecom Europe Ltd. | 256 | — | 1 |
| AS204318GB | BGPTOOLS-QA Benjamin Cartwright-Cox | 256 | 105 | 106 |
| AS44268GB | JCB-AS J.C. BAMFORD EXCAVATORS LIMITED | 256 | — | 1 |
| AS208393GB | DEDCLOUD Dedcloud Network Ltd | 256 | — | 1 |