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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 |
| 2.3K |
| — |
| 5 |
| AS47582GB | ansonnet-as-uk ANSON NETWORK LIMITED | 2.3K | — | 3 |
| AS60793GB | OCEAN-AS TELEFONICA TECH NORTHERN IRELAND LIMITED | 2.3K | 65.5K | 4 |
| AS204103GB | commswest Comms West Limited | 2.3K | 65.5K | 7 |
| AS213495GB | SERVITRO-LTD SERVITRO LTD | 2.3K | 1 | 10 |
| AS34922GB | NETNAMES CSC Administrative Services Limited | 2K | — | 5 |
| AS8942GB | Costar UK Limited | 2K | — | 4 |
| AS209738GB | IONFIBRE CURVE INFORMATION TECHNOLOGY LIMITED | 2K | — | 8 |
| AS35299GB | ASC2k C2k | 2K | — | 1 |
| AS50948GB | amdocs-uk-dc-as AMDOCS (UK) LIMITED | 2K | — | 6 |
| AS11856GB | XCONNECT-TECH - XC Technology Holdings LTD | 2K | — | 3 |
| AS207039GB | SAC-AS Satellite Applications Catapult Limited | 2K | — | 3 |
| AS35838GB | CCANET CCANET Limited | 2K | — | 1 |
| AS31223GB | EA-UK-LHR Electronic Arts Limited | 2K | — | 2 |
| AS204436GB | KUALO-AS Kualo Limited | 2K | 65.5K | 3 |
| AS42775GB | DSRT-NET ADWORLDS TECHNOLOGIES LP | 2K | 1 | 4 |
| AS200961GB | FWI2-ASN FIL INVESTMENT MANAGEMENT LIMITED | 2K | — | 8 |
| AS201542GB | micloud Mitel Networks Limited | 2K | — | 5 |
| AS8444GB | HENDERSON JANUS HENDERSON ADMINISTRATION UK LIMITED | 2K | — | 8 |
| AS31003GB | IRON-MOUNTAIN-UK-AS Iron Mountain Europe (Group) Limited | 2K | — | 2 |
| AS202206GB | MOTIVE FAT MEDIA LTD | 2K | — | 7 |
| AS199675GB | WGSLEDC Willis Group Services Ltd | 2K | — | 5 |
| AS34737GB | QinetiQ-ISP Qinetiq Limited | 2K | — | 4 |
| AS44442GB | TelfordWrekinCouncilAS The Borough of Telford and Wrekin Council | 2K | — | 1 |
| AS34746GB | AXA_INSURANCE AXA Insurance UK plc | 2K | — | 1 |
| AS209611GB | HFLBROADBAND HFLBroadband Ltd | 2K | — | 2 |
| AS206999GB | oakfordis Oakford Internet Services Ltd | 2K | — | 8 |
| AS25108GB | IOMART-APAC-AS Iomart Managed Services Limited | 2K | 65.5K | 6 |
| AS28729GB | FORD-AS Ford Motor Company Limited | 2K | 1 | 2 |
| AS21422GB | CONNECT-LIVERPOOL Connect internet Solutions Limited | 2K | — | 1 |
| AS198850GB | HOGARTH-WORLDWIDE WPP PRODUCTION LIMITED | 2K | — | 1 |
| AS200203GB | DATABRIDGE GLOBAL DATA BRIDGE INTERNATIONAL LIMITED | 2K | 12.3K | 11 |
| AS201358GB | FNZ-UK FNZ (UK) Ltd | 2K | — | 3 |
| AS47113GB | SLP Suffolk Life Pensions Limited | 2K | — | 1 |
| AS206547GB | CDK-Global-EU Keyloop Holdings (UK) Limited | 2K | — | 4 |
| AS41400GB | GNOL-AS R.M. Wotton T/A G-Net Online | 2K | 524.3K | 3 |
| AS210757GB | BSL Blackbird Solutions Limited | 2K | — | 5 |
| AS200700GB | BMC_UK-1 BMC TV LTD | 2K | — | 5 |
| AS43534GB | CREDITCALL Network Merchants Limited | 2K | — | 5 |
| AS138177GB | NOMINET-AS-AP-RESMDNS - NOMINET UK | 2K | 7 | 15 |
| AS61012GB | LIVEDRIVE Livedrive Internet Ltd. | 2K | 65.5K | 4 |
| AS60841GB | BERRYBYTE berrybyte Limited | 2K | — | 8 |
| AS59933GB | SENSICAL Sensical Services Limited | 2K | 65.5K | 4 |
| AS203987GB | VYSIION-AS Vysiion Limited | 2K | — | 2 |
| AS49694GB | UK-FR-MNLTD Masternaut Limited | 2K | 3 | 11 |
| AS205693GB | dvla Driver & Vehicle Licensing Agency | 2K | — | 4 |
| AS201738GB | UFO-TECHNOLOGIES-LIMITED UFO TECHNOLOGIES LIMITED | 2K | — | 8 |