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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.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS5089GB | NTL Virgin Media Limited | 23M | 289 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.4M | 543 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET - Jisc Services Limited | 7M | 219 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.4M | 79 |
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
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.
3,132 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS206999GB | oakfordis Oakford Internet Services Ltd | 2K | — | 8 |
| AS60925GB | BPP-ASN BPP Services Limited | 2K | — | 1 |
| AS201542GB | micloud Mitel Networks Limited | 2K | — | 5 |
| AS31003GB | IRON-MOUNTAIN-UK-AS Iron Mountain Europe (Group) Limited | 2K | — | 2 |
| AS34746GB | AXA_INSURANCE AXA Insurance UK plc | 2K | — | 1 |
| AS207158GB | WORLDCDN Clouvider Limited | 2K | — | 8 |
| AS205309GB | prodec_networks Prodec Networks Ltd | 2K | — | 3 |
| AS58305GB | SYN-US SYN LTD | 2K | 13 | 21 |
| AS49829GB | ADM-ASN ADM COMPUTER SERVICES LIMITED | 2K | — | 3 |
| AS34737GB | QinetiQ-ISP Qinetiq Limited | 2K | — | 4 |
| AS47113GB | SLP Suffolk Life Pensions Limited | 2K | — | 1 |
| AS206547GB | CDK-Global-EU Keyloop Holdings (UK) Limited | 2K | — | 4 |
| AS203987GB | VYSIION-AS Vysiion Limited | 2K | — | 2 |
| AS215262GB | CLOUDNORD-UKNODE-AS Cloud Nord Limited | 2K | 18 | 9 |
| AS198850GB | HOGARTH-WORLDWIDE WPP PRODUCTION LIMITED | 2K | — | 1 |
| AS42775GB | DSRT-NET ADWORLDS TECHNOLOGIES LP | 2K | 1 | 4 |
| AS34922GB | NETNAMES CSC Administrative Services Limited | 2K | — | 5 |
| AS200961GB | FWI2-ASN FIL INVESTMENT MANAGEMENT LIMITED | 2K | — | 8 |
| AS209738GB | IONFIBRE CURVE INFORMATION TECHNOLOGY LIMITED | 2K | — | 8 |
| AS31223GB | EA-UK-LHR Electronic Arts Limited | 2K | — | 2 |
| AS56718GB | INTOUCH-BROADBAND Redshelf Ltd | 2K | 197.1K | 12 |
| AS209611GB | HFLBROADBAND HFLBroadband Ltd | 2K | — | 2 |
| AS8942GB | Costar UK Limited | 2K | — | 4 |
| AS59933GB | SENSICAL Sensical Services Limited | 2K | 65.5K | 4 |
| AS205502GB | Inception Inception Hosting Limited | 2K | — | 8 |
| AS35838GB | CCANET CCANET Limited | 2K | — | 1 |
| AS35299GB | ASC2k C2k | 2K | — | 1 |
| AS59493GB | MIMIC Cudo Ventures Ltd | 2K | 196.6K | 5 |
| AS56745GB | KALNET4U Kalnet4u Ltd | 2K | 65.5K | 2 |
| AS205693GB | dvla Driver & Vehicle Licensing Agency | 2K | — | 4 |
| AS44442GB | TelfordWrekinCouncilAS The Borough of Telford and Wrekin Council | 2K | — | 1 |
| AS49418GB | AS-NETSHIELD NETSHIELD LTD | 2K | 68 | 13 |
| AS50948GB | amdocs-uk-dc-as AMDOCS (UK) LIMITED | 2K | — | 6 |
| AS8444GB | HENDERSON JANUS HENDERSON ADMINISTRATION UK LIMITED | 2K | — | 8 |
| AS41400GB | GNOL-AS R.M. Wotton T/A G-Net Online | 2K | 524.3K | 3 |
| AS43534GB | CREDITCALL Network Merchants Limited | 2K | — | 5 |
| AS34350GB | MANGROUP Man Investments Limited | 2K | — | 5 |
| AS59836GB | CBRE-EMEA CBRE Limited | 2K | — | 8 |
| AS202206GB | MOTIVE FAT MEDIA LTD | 2K | — | 7 |
| AS204436GB | KUALO-AS Kualo Limited | 2K | 65.5K | 3 |
| AS200700GB | BMC_UK-1 BMC TV LTD | 2K | — | 5 |
| AS49694GB | UK-FR-MNLTD Masternaut Limited | 2K | 3 | 11 |
| AS210757GB | BSL Blackbird Solutions Limited | 2K | — | 5 |
| AS51439GB | AIG-EUROPE-SERVICES-LTD AIG Europe (Services) Limited | 2K | 3 | 7 |
| AS61012GB | LIVEDRIVE Livedrive Internet Ltd. | 2K | 65.5K | 4 |
| AS25108GB | IOMART-APAC-AS Iomart Managed Services Limited | 2K | 65.5K | 6 |
| AS60841GB | BERRYBYTE berrybyte Limited | 2K | — | 8 |
| AS199675GB | WGSLEDC Willis Group Services Ltd | 2K | — | 5 |
| AS201358GB | FNZ-UK FNZ (UK) Ltd | 2K | — | 3 |
| AS34499GB | BlackBox-LINX BlackBox Hosting Ltd | 2K | — | 5 |