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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 | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 976.9K | 4,012 |
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| AS47918GB | MCDEU03 MCD Europe Limited | — | — | 0 |
| AS51782GB | VONEUS Voneus Ltd | — | — | 0 |
| AS44008GB | RBKC Royal Borough of Kensington and Chelsea | — | — | 0 |
| AS43878GB | EUROPE-CONNECTED Clouvider Limited | — | — | 0 |
| AS43475GB | STFC-AS Science Technology Facilities Council | — | — | 0 |
| AS60710GB | NCL-IX-RS Stellium Networks Limited | — | — | 0 |
| AS34890GB | ASOS-AS ASOS.COM Limited | — | — | 0 |
| AS13017GB | CABLE-AND-WIRELESS VODAFONE ENTERPRISE EQUIPMENT LIMITED | — | — | 0 |
| AS8548GB | AS8548 Jisc Services Limited | — | — | 0 |
| AS214714GB | SIGNALX-UK SIGNALX CLOUD COMMUNICATIONS LTD | — | — | 0 |
| AS204931GB | PNOSOLUTIONS-AS PNO Solutions Limited | — | 8 | 2 |
| AS43313GB | FLT ITS Technology Group Limited | — | — | 0 |
| AS42987GB | O2Business Virgin Media Limited | — | — | 0 |
| AS29506GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS214457GB | veesix-networks Veesix Networks Ltd | — | 524.3K | 1 |
| AS50711GB | SYN-ANY SYN LTD | — | — | 0 |
| AS13217GB | VODAFONE ENTERPRISE EQUIPMENT LIMITED | — | — | 0 |
| AS216254GB | GAZLEE Gary Lee | — | — | 0 |
| AS215909GB | AS-EDGENIX Edgenix LTD | — | — | 0 |
| AS49512GB | EVERMERE Evermere Capital Management Ltd | — | — | 0 |
| AS212902GB | KKL Kustom Konsulting Limited | — | — | 0 |
| AS212263GB | AS-ROCKETFIBRE Rocket Fibre Ltd | — | — | 0 |
| AS200499GB | EHL-AS Enterprises Holding LTD | — | 1 | 1 |
| AS211787GB | Rolosoft-Ltd Rolosoft Limited | — | — | 0 |
| AS210090GB | PIPER-AS Zack Piper | — | — | 0 |
| AS209230GB | SERVERNET-ASv SERVERNET INTERNET LIMITED | — | — | 0 |
| AS29478GB | JUNESTA Karl Dyson | — | 2 | 2 |
| AS206981GB | TeritumDevelopment Christopher Mountford | — | — | 0 |
| AS203397GB | curveit CURVE INFORMATION TECHNOLOGY LIMITED | — | — | 0 |
| AS6763GB | SKY-GROUP-BACKBONE-AS Sky UK Limited | — | — | 0 |
| AS214811GB | BetInvest-AS Bet Invest LTD | — | — | 0 |
| AS200104GB | crow You are never Limited | — | 4.1K | 1 |
| AS213201GB | AS213201 Mathew Philipps | — | — | 0 |
| AS210533GB | xfour Benjamin Lewis | — | — | 0 |
| AS206671GB | NotMike Michael Jones | — | — | 0 |
| AS197378GB | ZYME Zyme Limited | — | 1 | 1 |
| AS206307GB | aeromobile Aeromobile Communications Limited | — | — | 0 |
| AS39192GB | JackNet John Hadrill | — | — | 0 |
| AS203164GB | Traveljigsaw-Ltd Booking.com Transport Limited | — | — | 0 |
| AS201798GB | ABINTERNET Bogons Ltd | — | — | 0 |
| AS201327GB | H2NET H2NET LIMITED | — | — | 0 |
| AS199766GB | JNET Julita Oskroba | — | — | 0 |
| AS199534GB | INTERFIBER-CI Interfiber Ltd | — | — | 0 |
| AS209507GB | REALLY-AWESOME-TECHNOLOGY Really Awesome Technology LTD | — | 1 | 1 |
| AS60477GB | SIXDG-INSITE Six Degrees Technology Group Limited | — | — | 0 |
| AS56726GB | fouron 4on LTD | — | — | 0 |