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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 |
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| 0 |
| AS197872GB | EA-NL-AMSTERDAM_DC Electronic Arts Limited | — | — | 0 |
| AS201762GB | RBK-AS Royal Borough of Kingston Council | — | — | 0 |
| AS210467GB | Alncom ALNWICK COMPUTERWARE LTD. | — | — | 0 |
| AS44218GB | CTBY-ASN China Telecom Europe Ltd. | — | — | 0 |
| AS50871GB | IXBRADFORD IXBRADFORD LIMITED | — | — | 0 |
| AS39215GB | TRANSTELLIGENCE Astutium Limited | — | — | 0 |
| AS56739GB | DICO PRT Systems Limited | — | — | 0 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS211427GB | Origin Origin Solutions Limited | — | — | 0 |
| AS47999GB | TCL-AS Verint Systems UK Limited | — | — | 0 |
| AS57276GB | OPTIMITY Vorboss Limited | — | — | 0 |
| AS213863GB | SmartIXPRouteServers SMARTNET LIMITED | — | — | 0 |
| AS212759GB | ASN-Trogon Trogon Group Ltd | — | — | 0 |
| AS197360GB | HQ-24Ping-Ltd 24Ping Ltd. | — | — | 0 |
| AS213202GB | The-Cloud-Systems-Group Cloudnet Computing Ltd | — | — | 0 |
| AS213289GB | iqvia Redcentric Solutions Ltd | — | — | 0 |
| AS52037GB | y-internet Blackbridge Limited | — | — | 0 |
| AS205210GB | ECHOSTREAM ECHOSTREAM LIMITED | — | — | 0 |
| AS199208GB | EY-DE-NGDC-2 EY Global Services Limited | — | — | 0 |
| AS29131GB | RAPIDSWITCH-AS IOMART CLOUD SERVICES LIMITED | — | — | 0 |
| AS8714GB | LINX-ROUTESRV London Internet Exchange Ltd. | — | — | 0 |
| AS209869GB | OLLIES_CLOUD Ollie's Cloud LTD | — | — | 0 |
| AS35082GB | TALKSTRAIGHT-AS Talk Straight Ltd. | — | — | 0 |
| AS215474GB | BIIL-RU-AS BIIL RU LTD | — | — | 0 |
| AS212534GB | LONIX SIGNALX CLOUD COMMUNICATIONS LTD | — | — | 0 |
| AS25376GB | NETNORTH-ASN Netnorth Limited | — | — | 0 |
| AS12640GB | COLT Technology Services Group Limited | — | — | 0 |
| AS211438GB | SIC-AS Shetland Islands Council | — | — | 0 |
| AS210377GB | sift-ltd Sift Ltd | — | — | 0 |
| AS25041GB | AWS-DX British Telecommunications PLC | — | — | 0 |
| AS214834GB | Rekade-Networks LASTRESPONSE LTD | — | — | 0 |
| AS214665GB | PROJECT-PC Adam Beddall | — | — | 0 |
| AS203453GB | DiscountWebHosting RegXpress Ltd | — | — | 0 |
| AS63053GB | IIX-AZIIX-RS - IX Reach Ltd | — | — | 0 |
| AS211067GB | LEC Eastbourne Borough Council | 256 | — | 1 |
| AS211032GB | ASHALLSON LOBOS NETWORKING LTD | 256 | — | 1 |
| AS209215GB | Moe-Network-LTD Moe Network Ltd | 256 | 16 | 2 |
| AS209503GB | Zentyx Zentyx Limited | 256 | 1 | 2 |
| AS49978GB | IXARIS NIUM SYSTEMS UK LIMITED | 256 | — | 1 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS209635GB | RedMatter-Internal Red Matter Limited | 256 | 1 | 2 |
| AS206512GB | TIGOVA TIGOVA NETWORK LIMITED | 256 | — | 1 |
| AS207067GB | Gigasonic Commsworld Ltd | 256 | 65.5K | 2 |
| AS198375GB | DELUSION-NET Delusion Limited | 256 | 1 | 2 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS204539GB | AXIC-Axivora-Connect-Ltd Axivora Connect LtD | 256 | 59 | 15 |