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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 | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 968.4K | 3,979 |
| 256 |
| — |
| 1 |
| AS47744GB | ANNECTO-AS XTEND SOLUTIONS LTD | 256 | — | 1 |
| AS207080GB | Basil-Fillan Jack Fillan | 256 | 65.5K | 2 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS200280GB | CameronSharp Cameron Sharp | 256 | 1 | 2 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS56739GB | DICO PRT Systems Limited | 256 | — | 1 |
| AS49049GB | BATH-NORTH-EAST-SOMERSET-COUNCIL Bath North East Somerset Council | 256 | — | 1 |
| AS42359GB | WEMBLEY-AS The Football Association Ltd. | 256 | — | 1 |
| AS207089GB | uk-itsystems IT Systems & Support Limited | 256 | 524.3K | 2 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS204942GB | MifiNorx-AS MIFINORX LTD | 256 | — | 1 |
| AS60431GB | PNO-AS PNO Solutions Limited | 256 | 49 | 5 |
| AS201831GB | ACTIVETRADES-AS ActivTrades Plc. | 256 | — | 1 |
| AS212868GB | GLITCH-SERVERS CHAPMAN Adam | 256 | 1 | 2 |
| AS49978GB | IXARIS NIUM SYSTEMS UK LIMITED | 256 | — | 1 |
| AS60339GB | H3GUK Hutchison 3G UK Limited | 256 | — | 1 |
| AS216036GB | TOTALCOMMS-AS Signal Telecom Ltd | 256 | — | 1 |
| AS208393GB | DEDCLOUD Dedcloud Network Ltd | 256 | 2 | 3 |
| AS204778GB | PaulLewis Paul Nicholas Lewis | 256 | 1 | 2 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS56929GB | WBC-NET WANDSWORTH-BOROUGH-COUNCIL | 256 | — | 1 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS201694GB | RethinkTS Rethink Technology Solutions Ltd | 256 | — | 1 |
| AS44782GB | UK-FOREX-AS Stratos Markets Limited | 256 | — | 1 |
| AS21464GB | EDF-AS EDF Trading Ltd | 256 | — | 1 |
| AS197958GB | Ogilvie-Communications NET DEFENCE LIMITED | 256 | — | 1 |
| AS214770GB | RGN RGN Holding Ltd. | 256 | 34 | 5 |
| AS214294GB | NoobNet NOOB RP LTD | 256 | 2 | 3 |
| AS207273GB | PHAROAH-AS Pharoah Tools Limited | 256 | — | 1 |
| AS209870GB | Cylo Cylo Ltd | 256 | — | 1 |
| AS47534GB | VocaLink-north-Ltd VOCALINK LTD | 256 | — | 1 |
| AS202590GB | HACKLAB Edinburgh Hacklab Ltd | 256 | 1 | 2 |
| AS200304GB | Everyday-Communications Everyday Communications LTD | 256 | — | 1 |
| AS28934GB | MIZUHO-AS Mizuho International Plc | 256 | — | 1 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |
| AS196902GB | DUDLEY-MBC Dudley Metropolitan Borough Council | 256 | — | 1 |
| AS207652GB | BISAS Key IoT Limited | 256 | 524.3K | 2 |
| AS50888GB | MINOTAUR-ASN Minotaur I.T. Limited | 256 | — | 1 |
| AS213565GB | Badonde-Networks David Davies | 256 | 65.5K | 3 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS210584GB | PwCITSCo PricewaterhouseCoopers IT Services Limited | 256 | — | 1 |
| AS198222GB | WHC-AS West Herts College | 256 | — | 1 |
| AS51926GB | P1C-AS PageOne Communications Ltd | 256 | — | 1 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 256 | 1 | 2 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |