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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 |
| 256 |
| — |
| 1 |
| AS52024GB | kwik-fit-gb KWIK-FIT (GB) Limited | 256 | — | 1 |
| AS58117GB | TOUCHTEC TouchTec Technology Limited | 256 | — | 1 |
| AS213646GB | monkey-tree-hosting Monkey Tree Hosting Limited | 256 | 131.1K | 3 |
| AS201854GB | octopustelecom Octopus Telecom Ltd | 256 | — | 1 |
| AS201528GB | ORCHID-CELLMARK-CHORLEY Orchid Cellmark Ltd | 256 | 1 | 2 |
| AS205676GB | DCE Data Center Experts LTD | 256 | — | 1 |
| AS206457GB | EA-IE-GALWAY Electronic Arts Limited | 256 | — | 1 |
| AS207846GB | Lauren-Kelly Lauren Renee Kelly | 256 | 1 | 2 |
| AS210584GB | PwCITSCo PricewaterhouseCoopers IT Services Limited | 256 | — | 1 |
| AS212729GB | ERL Everlight Radiology Limited | 256 | — | 1 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS208098GB | GPS THREDD UK LIMITED | 256 | — | 1 |
| AS59756GB | ENQUEST-AS Enquest Britain Limited | 256 | — | 1 |
| AS16339GB | VI-UK Virtual Internet (UK) Limited | 256 | — | 1 |
| AS57770GB | ECHOINTERNET Echo Internet Limited | 256 | — | 1 |
| AS57672GB | DJA-ASN Daniel James Austin | 256 | 1 | 2 |
| AS204318GB | BGPTOOLS-QA Benjamin Cartwright-Cox | 256 | 82.2K | 250 |
| AS29200GB | ESEYE Eseye Ltd | 256 | 524.3K | 2 |
| AS39576GB | Prostack-Hosting Sharpstack Hosting Ltd | 256 | 1 | 2 |
| AS29019GB | MORNINGSTAR-EUROPE Morningstar Europe Limited | 256 | — | 1 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS203403GB | Flextel Flextel Limited | 256 | — | 1 |
| AS198892GB | MIXCLOUD-AS MIXCLOUD LTD | 256 | — | 1 |
| AS48987GB | JYANGNET Jiaxun Yang | 256 | 2 | 3 |
| AS212788GB | edgenet Edge Network Technologies Ltd | 256 | — | 1 |
| AS211165GB | asbattyhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS47219GB | NTT_GDC_Anycast NTT Global Data Centers EMEA UK Ltd. | 256 | 1 | 2 |
| AS206800GB | EA-SE-STOCKHOLM Electronic Arts Limited | 256 | — | 1 |
| AS211803GB | AS_INTER_ACT CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS49967GB | MTVH THAMES VALLEY HOUSING ASSOCIATION LIMITED | 256 | — | 1 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS212124GB | UPMIND Upmind Automation Limited | 256 | — | 1 |
| AS215635GB | NUSO-AMS NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS211142GB | as_gaussmanltd CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS60914GB | TelecomsConsortiumLtd Telecoms Consortium Ltd. | 256 | — | 1 |
| AS211855GB | FRAMES In The Frame (Manchester) Ltd | 256 | — | 1 |
| AS197924GB | DARKLESS Darkless Ltd | 256 | — | 1 |
| AS24894GB | TAGWORLDWIDE Tag Europe Ltd | 256 | — | 1 |
| AS15752GB | BP-US-1 BP International Ltd | 256 | — | 1 |
| AS201303GB | CentralNic-Anycast-F CentralNic Ltd | 256 | 1 | 2 |
| AS196902GB | DUDLEY-MBC Dudley Metropolitan Borough Council | 256 | 1 | 2 |
| AS204711GB | honest Honest Enterprises Ltd. | 256 | 65.5K | 2 |
| AS209931GB | VirAir Virair Limited | 256 | — | 1 |
| AS197104GB | GENTOO-AS Gentoo Group Limited | 256 | — | 1 |
| AS202190GB | ARISTO-NET-NA ARISTO NETWORKS LTD | 256 | 1 | 2 |