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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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 954.4K | 3,910 |
| 256 |
| — |
| 1 |
| AS197106GB | TRPI-EU-AS T. Rowe Price International LTD | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS47935GB | QUANTUMUK-AS Quantum Communications Ltd | 256 | 65.5K | 2 |
| AS202275GB | GTSUK-AS Gaming Technology Solutions Ltd. | 256 | 1 | 2 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS205237GB | SAVILLS-PLC SAVILLS PLC | 256 | — | 1 |
| AS59621GB | FloNetworks-AS Flo Networks Limited | 256 | — | 1 |
| AS210456GB | EastCostHosting EastCoastHost Ltd | 256 | 1 | 2 |
| AS48375GB | TIBRA-LC-AS Tibra Trading Europe Limited | 256 | — | 1 |
| AS200473GB | Samsung-MSK-AS Samsung SDS Europe Ltd | 256 | — | 1 |
| AS51047GB | TURTLE-NET Turtle Networks Ltd | 256 | — | 1 |
| AS51946GB | NEWCASTLE-UNI-NUSAJAYA-CAMPUS University of Newcastle upon Tyne | 256 | — | 1 |
| AS209750GB | MBX-AS MBX DIGITAL LIMITED | 256 | — | 1 |
| AS204776GB | Mintopia Jessica Smith | 256 | 257 | 3 |
| AS196990GB | COMFIRST-AS Shawbrook Bank Limited | 256 | — | 1 |
| AS198892GB | MIXCLOUD-AS MIXCLOUD LTD | 256 | — | 1 |
| AS59904GB | LANCASHIRE_AS_RIPE LANCASHIRE INSURANCE SERVICES LTD | 256 | — | 1 |
| AS208902GB | ValeroUK Valero Energy Ltd | 256 | — | 1 |
| AS215252GB | LANTEC-AS Lantec Services Ltd | 256 | 1 | 2 |
| AS12628GB | SCREAMING-NET-AS JACO ENGELBRECHT | 256 | 1 | 2 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS211855GB | FRAMES In The Frame (Manchester) Ltd | 256 | — | 1 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS48706GB | EDP KERRIDGE COMMERCIAL SYSTEMS (KSH) LIMITED | 256 | — | 1 |
| AS197284GB | K3X-MNT K3X SYSTEMS Ltd | 256 | 1 | 2 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS214064GB | Kevin-Titmarsh Kevin Titmarsh | 256 | 1 | 2 |
| AS208590GB | AVE-AS Lasagna Ltd | 256 | 65.5K | 2 |
| AS59809GB | AS21IN Numeric Futures Limited | 256 | — | 1 |
| AS201831GB | ACTIVETRADES-AS ActivTrades Plc. | 256 | — | 1 |
| AS8272GB | NETSCALIBUR-UK Claranet Limited | 256 | — | 1 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS204767GB | PRIVATE-DATACENTER VIRTUAL PRIVATE SERVER DATACENTER LIMITED | 256 | — | 1 |
| AS207295GB | Akhtar Akhtar Technologies Limited | 256 | — | 1 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS213493GB | NYRU NYRU Services Limited | 256 | — | 1 |
| AS199330GB | CENTRALNIC-ANYCAST-A CentralNic Ltd | 256 | 1 | 2 |
| AS203108GB | iTouchVision iTouch Vision LTD | 256 | — | 1 |
| AS199794GB | EMO-AS EMOCLOUD LTD | 256 | 272 | 3 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS203403GB | Flextel Flextel Limited | 256 | — | 1 |
| AS50888GB | MINOTAUR-ASN Minotaur I.T. Limited | 256 | — | 1 |
| AS33879GB | FORTHS-PORTS-PLC Forth Ports Public Limited Company | 256 | — | 1 |
| AS58117GB | TOUCHTEC TouchTec Technology Limited | 256 | — | 1 |
| AS39461GB | BE-AS EDF ENERGY NUCLEAR GENERATION LIMITED | 256 | — | 1 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |