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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 | 4,127 |
| 256 |
| — |
| 1 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS211829GB | Zaha ZAHA HADID LIMITED | 256 | — | 1 |
| AS211165GB | asbattyhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS214214GB | Threadneedle_MNT Threadneedle Asset Management Holdings Ltd | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS207089GB | uk-itsystems IT Systems & Support Limited | 256 | 524.3K | 2 |
| AS196990GB | COMFIRST-AS Shawbrook Bank Limited | 256 | — | 1 |
| AS200473GB | Samsung-MSK-AS Samsung SDS Europe Ltd | 256 | — | 1 |
| AS43131GB | KAY-NET Kay Net (UK) Ltd | 256 | 16 | 2 |
| AS207067GB | Gigasonic Commsworld Ltd | 256 | 65.5K | 2 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS199385GB | GNOME Midland Press Ltd | 256 | — | 1 |
| AS51303GB | Warsaw IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS39459GB | PGL-AS Office Unlocked Limited | 256 | — | 1 |
| AS206530GB | VOXYONDER VOXYONDER NETWORK SERVICES UK LTD | 256 | — | 1 |
| AS12628GB | SCREAMING-NET-AS JACO ENGELBRECHT | 256 | 1 | 2 |
| AS198075GB | BOUNCEZERO-MNT BounceZero Ltd | 256 | — | 1 |
| AS206933GB | nscglobal NSC Global Limited | 256 | — | 1 |
| AS200597GB | DIGITALK-SG1 DIGITALK Limited | 256 | — | 1 |
| AS203589GB | HOSTWEAVE-AS HOSTWEAVE LTD | 256 | 256 | 2 |
| AS56929GB | WBC-NET WANDSWORTH-BOROUGH-COUNCIL | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS215635GB | NUSO-AMS NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS42465GB | FORCEPOINT-ANYCAST-AS Forcepoint UK Limited | 256 | — | 1 |
| AS60758GB | DMC-AS Deluxe UK Holdings Limited | 256 | — | 1 |
| AS29019GB | MORNINGSTAR-EUROPE Morningstar Europe Limited | 256 | — | 1 |
| AS204045GB | COMPASSPLUSGB-AS Compass Plus (Great Britain) Limited | 256 | — | 1 |
| AS208623GB | Threadneedle_MNT Threadneedle Asset Management Holdings Ltd | 256 | — | 1 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |
| AS200498GB | PWP-ASN Perella Weinberg Partners UK LLP | 256 | — | 1 |
| AS201676GB | WAGHORN-CAPITAL-CO WAGHORN CAPITAL CO LTD | 256 | — | 1 |
| AS47255GB | MCDEU02 MCD Europe Limited | 256 | — | 1 |
| AS204942GB | MifiNorx-AS MIFINORX LTD | 256 | — | 1 |
| AS214770GB | RGN RGN Holding Ltd. | 256 | 34 | 5 |
| AS210005GB | easysoft Easysoft Ltd | 256 | — | 1 |
| AS204055GB | CentralNic-Anycast-H CentralNic Ltd | 256 | 1 | 2 |
| AS39717GB | POLESTAR-AS Polestar Ltd | 256 | — | 1 |
| AS196741GB | DATAART-USDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS202141GB | HALLHOST-AS Warren Hall | 256 | — | 1 |
| AS56723GB | EA-ES-OMBU Electronic Arts Limited | 256 | — | 1 |
| AS209215GB | Moe-Network-LTD Moe Network Ltd | 256 | 16 | 2 |
| AS213798GB | POWELL-AS Jude Gabriel Powell | 256 | 282 | 13 |
| AS214188GB | VoltHosting VoltHosting Ltd | 256 | 256 | 2 |
| AS20915GB | HUNDRED-PERCENT-IT CYBERHIVE LTD | 256 | — | 1 |