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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.
3,132 autonomous systems registered to United Kingdom. Click an AS for detail.
| 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 |
| 256 |
| — |
| 1 |
| AS49606GB | MCDEU01 MCD Europe Limited | 256 | — | 1 |
| AS200416GB | BG-MED Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS204340GB | IQVIA-Germany IQVIA LTD. | 256 | — | 1 |
| AS204942GB | MifiNorx-AS MIFINORX LTD | 256 | — | 1 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS29019GB | MORNINGSTAR-EUROPE Morningstar Europe Limited | 256 | — | 1 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS209540GB | EXPEDIA-DUBLIN Expedia.com Ltd. | 256 | — | 1 |
| AS218757GB | MyCheapHost MYCHEAP LTD | 256 | — | 1 |
| AS211049GB | DHSC-ARP Department of Health and Social Care | 256 | — | 1 |
| AS30894GB | SINCH-MBLOX-AS SINCH UK LTD. | 256 | — | 1 |
| AS56929GB | WBC-NET WANDSWORTH-BOROUGH-COUNCIL | 256 | — | 1 |
| AS201815GB | MEGADITTA ItalPetrolCemenTermoTessilFarmoMetalChimica LTD | 256 | 16 | 2 |
| AS202939GB | CHIMON-NETWORK Chimon Technology Ltd | 256 | 849 | 22 |
| AS209215GB | Moe-Network-LTD Moe Network Ltd | 256 | 16 | 2 |
| AS205237GB | SAVILLS-PLC SAVILLS PLC | 256 | — | 1 |
| AS215187GB | PROMISED God Promised Me Networks LTD | 256 | — | 1 |
| AS59809GB | AS21IN Numeric Futures Limited | 256 | — | 1 |
| AS212606GB | DiPocket DiPocket Limited | 256 | — | 1 |
| AS39617GB | CONSULTANCY-ASN Chris Burton | 256 | 1 | 2 |
| AS42460GB | Euralb_ASN Euralb-LTD | 256 | — | 1 |
| AS206773GB | MSXI MSX International Ltd | 256 | — | 1 |
| AS31632GB | OAG-AS OAG Aviation WorldWide Limited | 256 | — | 1 |
| AS205492GB | SCHRODERS-ZUR-AS Schroder Investment Management Limited | 256 | — | 1 |
| AS210025GB | XXSL Alice Cat Research Ltd | 256 | 10 | 11 |
| AS60220GB | EA-UK-WIL Electronic Arts Limited | 256 | — | 1 |
| AS207295GB | Akhtar Akhtar Technologies Limited | 256 | — | 1 |
| AS204828GB | EAJ-Global EAJ Global Ltd | 256 | 1 | 2 |
| AS34625GB | OSHS-AS OSHS Ltd | 256 | — | 1 |
| AS49781GB | b4rk Broadband for Rural Kent Ltd | 256 | — | 1 |
| AS209999GB | ARL Ascot Racecourse Ltd | 256 | — | 1 |
| AS60735GB | DELIGHTVPS-AS Konstantin Verba | 256 | 77.8K | 5 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS198231GB | SIXNET Sixnet Operation Ltd | 256 | — | 1 |
| AS207273GB | PHAROAH-AS Pharoah Tools Limited | 256 | — | 1 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS204055GB | CentralNic-Anycast-H CentralNic Ltd | 256 | 1 | 2 |
| AS204024GB | GRIFFINBANK Griffin Bank Ltd | 256 | 1 | 2 |
| AS213185GB | ETA-AS Eta Heese | 256 | 1 | 2 |
| AS216014GB | BestDC-Limited BestDC Limited | 256 | — | 1 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS59638GB | WITLTD Robert Mitchelmore | 256 | — | 1 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |
| AS56723GB | EA-ES-OMBU Electronic Arts Limited | 256 | — | 1 |
| AS207194GB | TOTALCOMPUTERS Total Computer Services Ltd | 256 | — | 1 |