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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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| AS50711GB | SYN-ANY SYN LTD | — | — | 0 |
| AS56802GB | DPKGSOFT-AS DpkgSoft International Limited | — | 1 | 1 |
| AS30897GB | Pentagon-Systems RDS Global Limited | — | — | 0 |
| AS31402GB | BlueSquare Rank Digital Limited | — | — | 0 |
| AS5622GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS48071GB | NORTHCOTE-AS Northcote Internet Limited | — | — | 0 |
| AS48910GB | INAP-FRA PACKETFABRIC (UK) LTD | — | — | 0 |
| AS52076GB | ALGOSPAN-AS PICO GLOBAL LTD. | — | — | 0 |
| AS57155GB | COAST805-AS Contingency Networks Ltd | — | — | 0 |
| AS35662GB | IOMARTHOSTING Iomart Managed Services Limited | — | — | 0 |
| AS210533GB | xfour Benjamin Lewis | — | — | 0 |
| AS213201GB | AS213201 Mathew Philipps | — | — | 0 |
| AS201824GB | stat-cons-as STAT CONSULTING LTD | — | 1 | 1 |
| AS214811GB | BetInvest-AS Bet Invest LTD | — | — | 0 |
| AS6763GB | SKY-GROUP-BACKBONE-AS Sky UK Limited | — | — | 0 |
| AS47918GB | MCDEU03 MCD Europe Limited | — | — | 0 |
| AS24669GB | CLOUVIDER-NETWORK-OPTIMISATION Clouvider Limited | — | — | 0 |
| AS209565GB | JIANYUELAB-STAFF JIANYUELAB LTD | — | 2 | 2 |
| AS30746GB | NAT-MORRIS Nat Morris | — | — | 0 |
| AS206671GB | NotMike Michael Jones | — | — | 0 |
| AS29478GB | JUNESTA Karl Dyson | — | 2 | 2 |
| AS38237GB | LOADEDGE LoadEdge Limited | — | — | 0 |
| AS200499GB | EHL-AS Enterprises Holding LTD | — | 1 | 1 |
| AS215963GB | torin Torin Storkey | — | — | 0 |
| AS214457GB | veesix-networks Veesix Networks Ltd | — | 524.3K | 1 |
| AS50935GB | International-Hosting-Solutions-AS INTERNATIONAL HOSTING SOLUTIONS LLP | — | — | 0 |
| AS197213GB | NINETY-ONE-TELECOM 91TELECOM LTD | — | — | 0 |
| AS204931GB | PNOSOLUTIONS-AS PNO Solutions Limited | — | 8 | 2 |
| AS199534GB | INTERFIBER-CI Interfiber Ltd | — | — | 0 |
| AS204375GB | Adam-Goodenough Adam Goodenough | — | 17 | 2 |
| AS29506GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS42987GB | O2Business Virgin Media Limited | — | — | 0 |
| AS43313GB | FLT ITS Technology Group Limited | — | — | 0 |
| AS197613GB | NMARSHALL-AS Nicholas Marshall | — | 17 | 2 |
| AS49512GB | EVERMERE Evermere Capital Management Ltd | — | — | 0 |
| AS56726GB | fouron 4on LTD | — | — | 0 |
| AS60477GB | SIXDG-INSITE Six Degrees Technology Group Limited | — | — | 0 |
| AS213803GB | AS-Xray Xray Network Ltd | — | — | 0 |
| AS199766GB | JNET Julita Oskroba | — | — | 0 |
| AS201327GB | H2NET H2NET LIMITED | — | — | 0 |
| AS201798GB | ABINTERNET Bogons Ltd | — | — | 0 |
| AS213771GB | PLATANO-NETWORKS DCC TECH LTD | — | 10 | 3 |
| AS203164GB | Traveljigsaw-Ltd Booking.com Transport Limited | — | — | 0 |
| AS203397GB | curveit CURVE INFORMATION TECHNOLOGY LIMITED | — | — | 0 |
| AS206307GB | aeromobile Aeromobile Communications Limited | — | — | 0 |
| AS59566GB | LogicForge LogicForge Limited | — | 8.2K | 1 |