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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.
3,132 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 | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
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| 10 |
| 10 |
| AS8760GB | ENERGIS-IRELAND VODAFONE ENTERPRISE EQUIPMENT LIMITED | — | — | 0 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS214168GB | SIXMANCHESTER Sixnet Operation Ltd | — | 65.5K | 1 |
| AS25085GB | ALUE-NET ALUE LTD | — | 10 | 10 |
| AS59705GB | POBOX2-AS Acora Limited | — | — | 0 |
| AS214160GB | SHREE Shreejal Maharjan | — | 3 | 3 |
| AS35736GB | WUK-AS EE Limited | — | — | 0 |
| AS210683GB | syo Syo.io Limited | — | 1 | 1 |
| AS43827GB | EnvAgency Environment Agency | — | — | 0 |
| AS208051GB | SR2COM SR2 Communications Limited | — | 32 | 2 |
| AS12755GB | COLT Technology Services Group Limited | — | — | 0 |
| AS207890GB | Intefluent Andrew Williams | — | 17 | 2 |
| AS9105GB | TISCALI-UK TalkTalk Communications Limited | — | — | 0 |
| AS34202GB | CLOUVIDER-THN2 Clouvider Limited | — | 1 | 1 |
| AS42902GB | GLOBECONNECT Clouvider Limited | — | — | 0 |
| AS215002GB | PRISMGG PRISM.GG Limited | — | 80 | 2 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 10 | 8 |
| AS202355GB | CIALLO-AS Ciallo Networks LTD | — | 256 | 1 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |
| AS208485GB | PINHOUSE-AS PINHOUSE LIMITED | — | 1 | 1 |
| AS56367GB | ALUE-NET ALUE LTD | — | 2 | 2 |
| AS206848GB | UKCDN Clouvider Limited | — | 256 | 1 |
| AS213543GB | JONES-LAB Alexander Jones | — | 1 | 1 |
| AS203766GB | AWILLS Andrew Wills | — | 1 | 1 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS200708GB | PROTEUS-AS Hugo Rodrigues Da Costa | — | 1 | 1 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS219361GB | SHIKANOKO-NETWORKS SHIKANOKO NETWORKS LTD | — | 1 | 1 |
| AS212483GB | level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD | — | 29 | 14 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS198657GB | GOHEGAN-NET Kai Gohegan | — | 257 | 2 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 2 | 2 |
| AS205909GB | Phystrax-Network Phystrax Ltd | — | 64 | 1 |
| AS204994GB | BAHAMUT-ZONE Luke Seabrook | — | 1 | 1 |
| AS198557GB | ONETTL George French | — | 1 | 1 |
| AS212232GB | BGPTOOLS Port 179 LTD | — | 4 | 4 |
| AS205649GB | TOSLER-NET Shaun Tosler | — | 1 | 1 |
| AS201335GB | SEVENNET-UK Seven Networking UK Ltd | — | 4 | 4 |
| AS206000GB | HRE Harry Rowan Elenor | — | 258 | 3 |
| AS201616GB | theoh-as Theo Holroyd | — | 2 | 2 |
| AS215022GB | FWLB-networks Jamie Hosker | — | 1 | 1 |
| AS61126GB | ROUTED Lee Valentine | — | 3 | 3 |
| AS219189GB | CLNEXUS CLNexus LTD | — | — | 0 |
| AS219526GB | Jakenet Jake Turner | — | 1 | 1 |
| AS47578GB | PRT-ANYCAST PRT Systems Limited | — | — | 0 |
| AS200198GB | DSMTech DSM (GB) Limited | — | 16 | 1 |