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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.
3,134 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 | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
| 1K |
| — |
| 3 |
| AS30756GB | CENDANT-AS Travelport International Limited | 1K | — | 2 |
| AS209899GB | NUBIS zananet Limited | 1K | — | 1 |
| AS56670GB | WSCC-AS West Sussex County Council | 1K | — | 2 |
| AS204258GB | vive-technologies-ltd Vive Technologies Ltd | 1K | 524.3K | 2 |
| AS60593GB | NR-DC-UK-AS Network Rail Infrastructure Limited | 1K | — | 3 |
| AS34523GB | EMAILSYSTEMS Webroot Services Ltd | 1K | — | 4 |
| AS211298GB | DRIFTNET Driftnet Ltd | 1K | 327.7K | 9 |
| AS60885GB | zengenti Zengenti Ltd. | 1K | — | 4 |
| AS200124GB | FLEXUK-AS FLEXTRADE UK LIMITED | 1K | — | 4 |
| AS16362GB | The-London-Metal-Exchange The London Metal Exchange | 1K | — | 3 |
| AS206405GB | CALIU CALIU LTD | 1K | — | 1 |
| AS207784GB | HYBIT-SERVICES HybrIT Services Ltd | 1K | — | 4 |
| AS205599GB | abfoods A.B.F.HOLDINGS LIMITED | 1K | — | 1 |
| AS60060GB | AECOM-EMEA AECOM Limited | 1K | — | 1 |
| AS59676GB | NETWORKSERVICES-SEC Network Services Ltd. | 1K | 2 | 6 |
| AS39520GB | SD-TECHOPS-NL Satcom Direct International Ltd. | 1K | — | 1 |
| AS34178GB | Qinetiq Qinetiq Limited | 1K | — | 4 |
| AS210279GB | DMT DIGITAL MEDIA TECHNOLOGIES LTD | 1K | — | 1 |
| AS207524GB | LONDSTOCK-US London Stock Exchange PLC | 1K | — | 3 |
| AS33968GB | InternetEngineeringAS EASYSPACE LIMITED | 1K | — | 1 |
| AS51318GB | STANDARD-CHARTERED-BANK-AS STANDARD CHARTERED BANK | 1K | — | 4 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 65.5K | 5 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS8669GB | TOTALWEBSOLUTIONS Total Web Solutions Ltd | 1K | — | 4 |
| AS213183GB | WHG-LUX WHG Hosting Services Ltd | 1K | — | 3 |
| AS206246GB | Formosa FORMOSA CAPITAL LP | 1K | 131.1K | 6 |
| AS206690GB | BFC-FR2 Beeks Financial Cloud Ltd | 1K | — | 4 |
| AS34344GB | THE-PORT-OF-TILBURY-LONDON-LTD Port Of Tilbury London Ltd | 1K | — | 3 |
| AS208408GB | KARANYI Karanyi Ltd | 1K | 4 | 8 |
| AS205389GB | ZOOM-INTERNET Zoom Internet Ltd | 1K | 65.5K | 2 |
| AS212413GB | DWP Department for Work and Pensions | 1K | — | 3 |
| AS199569GB | Cognizant-EU-AS Cognizant Worldwide Limited | 1K | 65.5K | 3 |
| AS216207GB | NEWCASTLE-COUNCIL-AS Newcastle City Council | 1K | — | 3 |
| AS206324GB | STELLIUM-DC Stellium Networks Limited | 1K | 524.3K | 2 |
| AS214437GB | nexgen-eu1 NexGen Cloud Ltd | 1K | — | 3 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS49440GB | plustel PLUSTEL LIMITED | 1K | 65.5K | 2 |
| AS202907GB | ATOMICIT Atomic IT Limited | 1K | 524.3K | 2 |
| AS205372GB | evrocomuk Evrocom.uk Limited trading as Fiber Zone | 1K | — | 1 |
| AS204116GB | HOSTRELAY-AS HOSTRELAY GLOBAL LTD | 1K | — | 4 |
| AS215304GB | SOLREN SOLREN LIMITED | 1K | — | 4 |
| AS197860GB | NET-HARUKA Haruka Network Limited | 1K | 36 | 10 |
| AS199629GB | NET-4MS 4MS Network Solutions Ltd. | 1K | 65.5K | 5 |
| AS15418GB | IONOS-ANYCAST Fasthosts Internet Limited | 1K | 2 | 2 |
| AS209199GB | Cloud-Unboxed-Limited Cloud Unboxed Limited | 1K | — | 4 |
| AS199516GB | PACKNET-AS PACKNET LIMITED | 1K | 524.3K | 5 |