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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 |
| 768 |
| — |
| 3 |
| AS43428GB | YAHOO-ULS Yahoo-UK Limited | 768 | 1 | 4 |
| AS9140GB | HYPERNEPH Hyperneph Ltd | 768 | — | 3 |
| AS199654GB | OXIDE-GROUP-LIMITED Oxide Group Limited | 768 | 4 | 7 |
| AS199492GB | EASYINTERNET Easy Internet Solutions Limited | 768 | — | 2 |
| AS202595GB | SQUIZUS Squiz UK Limited | 768 | — | 2 |
| AS39389GB | GTRL Gibson Thomas Rental Ltd | 768 | — | 2 |
| AS212807GB | RockIT-Net RockIT Networks Limited | 768 | 524.3K | 4 |
| AS15490GB | SHANEMCC Shane Mc Cormack | 768 | 524.3K | 3 |
| AS204777GB | telent telent Technology Services Ltd | 768 | — | 3 |
| AS202901GB | NETCALL Netcall Technology Limited | 768 | — | 3 |
| AS59907GB | IMSHealth IQVIA SOLUTIONS HQ LTD | 768 | — | 3 |
| AS206187GB | DIA-ASN Interactive Investor Services Limited | 768 | — | 3 |
| AS49490GB | CIRCLENET-AS Circlenet LLP | 768 | 65.5K | 3 |
| AS212406GB | TransFICC TransFICC Ltd. | 768 | — | 3 |
| AS212169GB | TECH-RMMINET CARDOCK HOSTING LIMITED | 768 | — | 3 |
| AS209134GB | REVOPCI Atmoso Limited | 768 | — | 3 |
| AS203070GB | YAHOO-FRA Yahoo-UK Limited | 768 | 1 | 4 |
| AS209888GB | AERIANDI-AS Aeriandi Limited | 768 | — | 3 |
| AS215675GB | perceptiontvcdn Perception TVCDN Ltd | 768 | — | 3 |
| AS21371GB | EQUINIX-UK-ASN EQUINIX (SERVICES) LIMITED | 768 | — | 2 |
| AS59920GB | LUSORY Lusory Limited | 768 | 4.1K | 4 |
| AS6911GB | PRO-NET Associated Networks (UK) Limited | 768 | — | 2 |
| AS59952GB | ExpediaEU Expedia.com Ltd. | 768 | — | 3 |
| AS54470GB | GCGKABAM - Garden City Games Ltd | 768 | — | 3 |
| AS34745GB | TELEWARE TeleWare Hosted Services Ltd. | 768 | — | 2 |
| AS207009GB | UK-FUTURE Future Publishing Ltd | 768 | 65.5K | 3 |
| AS204050GB | Yoti Yoti Ltd | 768 | 1 | 4 |
| AS214453GB | jandutech Beon Core Ltd | 768 | — | 3 |
| AS201226GB | LEASINGOPTIONSLTD-AS Leasing Options Limited | 768 | — | 2 |
| AS215821GB | AS215821 London Digital Systems LTD | 768 | 1 | 4 |
| AS209413GB | DEDIK-CH DEDIK SERVICES LIMITED | 768 | — | 3 |
| AS8336GB | InnovationGrpEMEA THE INNOVATION GROUP (EMEA) LTD | 768 | — | 3 |
| AS202665GB | SMSHW SMShighway Limited | 768 | — | 3 |
| AS205294GB | ThermoFisher Thermo Electron Ltd | 768 | — | 2 |
| AS202154GB | brevanhoward Brevan Howard Asset Management LLP | 768 | — | 3 |
| AS203035GB | xc360 Xara Computers (UK) Ltd | 768 | — | 3 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS208756GB | deas-001 ALCON TELECOM LTD | 1K | — | 3 |
| AS205106GB | PEASOUP Pea Soup Hosting Limited | 1K | — | 3 |
| AS205804GB | DELTAV Delta V Technologies Limited | 1K | 65.5K | 10 |
| AS210087GB | ONTIX Ontix Sites No1 Limited | 1K | — | 1 |
| AS205052GB | VISIONDATASOLUTIONS Vision Data Solutions LLP | 1K | 524.3K | 3 |
| AS199946GB | Ctalk Ctalk Limited | 1K | — | 4 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS44052GB | PRESSCOMPUTER-ASN ICONIC MEDIA SYSTEMS LIMITED | 1K | — | 3 |