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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
| — |
| 2 |
| 2 |
| AS9126GB | COLT Technology Services Group Limited | — | — | 0 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS215022GB | FWLB-networks Jamie Hosker | — | 1 | 1 |
| AS42192GB | India THUNDER NETWORK LIMITED | — | 1 | 1 |
| AS49182GB | BTEngageIT British Telecommunications Limited | — | — | 0 |
| AS214160GB | SHREE Shreejal Maharjan | — | 3 | 3 |
| AS25346GB | Tiscali-AS TalkTalk Communications Limited | — | — | 0 |
| AS199804GB | TFES-AS THE FIRST EAST STAR LTD | — | 1 | 1 |
| AS33408GB | WHG-SPARE-1 - World Host Group | — | — | 0 |
| AS208051GB | SR2COM SR2 Communications Limited | — | 16 | 1 |
| AS219203GB | CODERWAY-AS Coderway Limited | — | — | 0 |
| AS214818GB | WILL-WILSON William Wilson | — | 9 | 5 |
| AS218748GB | OSCAR-BRADLEY Oscar Lewis Bradley | — | — | 0 |
| AS213767GB | RH Richard Humphries | — | 1 | 1 |
| AS31270GB | FMN GCI Network Solutions Limited | — | — | 0 |
| AS215002GB | PRISMGG PRISM.GG Limited | — | 80 | 2 |
| AS212483GB | level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD | — | 30 | 15 |
| AS199688GB | CRITPERF-AS Critical Perfect Ltd | — | 16 | 1 |
| AS214931GB | ALUE-NET ALUE LTD | — | 1 | 1 |
| AS218843GB | OMNIVISION-INTERNET-GATEWAY Omnivision Solutions Ltd | — | 339 | 9 |
| AS213982GB | DISTRICTB-AS Callum Bennett | — | 17 | 2 |
| AS219457GB | Zephyrbash-Labs Evan Galvin | — | 1 | 1 |
| AS201616GB | theoh-as Theo Holroyd | — | 2 | 2 |
| AS219370GB | Johnson Benjamin Johnson | — | 22 | 7 |
| AS208699GB | ParsnsNetwork Leo Shum | — | 8 | 5 |
| AS216157GB | SIXNET-OP Sixnet Operation Ltd | — | 65.5K | 1 |
| AS215368GB | CONNORMCF Connor McFarlane | — | 1 | 1 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS219441GB | NEKONODE NEKONODE LTD | — | 2 | 2 |
| AS51939GB | TerraMC Terra Management Consulting Ltd | — | 28 | 13 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 28 | 16 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS12290GB | EXONETRIC Exonetric Consulting Ltd | — | 65.5K | 1 |
| AS204291GB | pinguin Thomas McLoughlin | — | 337 | 7 |
| AS200707GB | APPMAIL Integrated Digital Services Ltd | — | 65.5K | 1 |
| AS219327GB | DISASTER Disaster Limited | — | 1 | 1 |
| AS213092GB | marbleis Acrion International Limited | — | 28 | 13 |
| AS202615GB | ECHO Inspect Element Ltd | — | 1 | 1 |
| AS209771GB | SYSN SYSN LTD | — | 5 | 5 |
| AS219526GB | Jakenet Jake Turner | — | 1 | 1 |
| AS214242GB | Jx Jiaxing Xing | — | 784 | 4 |
| AS214749GB | PAW James Cahill | — | 6 | 6 |
| AS8686GB | SYSONLINE Digital Space Group Limited | — | — | 0 |
| AS202627GB | CARBONDNS Fika Studio Limited | — | 1 | 1 |
| AS43082GB | ServerSpace-AS Iomart Group Plc | — | — | 0 |
| AS58339GB | MARIA-AS MARIA STYLE LTD | — | 1.4K | 33 |