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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 |
| 1 |
| 1 |
| AS212483GB | level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD | — | 30 | 15 |
| AS218212GB | GuernseyOnline Hosting Ltd. | — | 1 | 1 |
| AS209771GB | SYSN SYSN LTD | — | 5 | 5 |
| AS201164GB | Cool-Studio Cool Studio Limited | — | 257 | 2 |
| AS215368GB | CONNORMCF Connor McFarlane | — | 1 | 1 |
| AS214749GB | PAW James Cahill | — | 6 | 6 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 28 | 16 |
| AS200455GB | HOTARU-AS HOTARU NETWORK LTD. | — | 162 | 12 |
| AS202525GB | CHUNMING-AS Chun Ming Ou | — | 3 | 3 |
| AS204660GB | Tiger-Technologies-Limited Tiger Technologies Limited | — | 1 | 1 |
| AS206792GB | ZACH Zachary Buller | — | 16 | 1 |
| AS58285GB | ASSIXOP Sixnet Operation Ltd | — | 10.6M | 256 |
| AS211035GB | PHANTOM-HIVE-AS PHANTOM HIVE NETWORK LTD | — | 2 | 2 |
| AS204291GB | pinguin Thomas McLoughlin | — | 337 | 7 |
| AS197378GB | ZYME Zyme Limited | — | 1 | 1 |
| AS216364GB | uk-globalreachtech Global Reach Technology EMEA Limited | — | 8.2K | 2 |
| AS59893GB | FRC-AS Free Range Cloud Ltd. | — | 4 | 4 |
| AS214018GB | IIC-AS INTERNET INTELLIGENCE COMPANY LTD | — | 1 | 1 |
| AS43336GB | ASPIXIE PIXIE NETWORKS LTD | — | 524.3K | 1 |
| AS207268GB | STREXP STRATEGIC EXPLORATIONS LTD | — | 24 | 6 |
| AS202776GB | Moeclub MOECLUB LTD | — | 9 | 9 |
| AS218671GB | WALKOWSKI-AS Lukasz Walkowski | — | 1 | 1 |
| AS218495GB | mindspit Rhys Jenkins | — | 2 | 2 |
| AS214160GB | SHREE Shreejal Maharjan | — | 3 | 3 |
| AS202615GB | ECHO Inspect Element Ltd | — | 1 | 1 |
| AS64474GB | ASN-IITSS IT Support Services Team Limited | — | 3 | 3 |
| AS215363GB | Wles Wles Technologies Ltd | — | 257 | 2 |
| AS25085GB | ALUE-NET ALUE LTD | — | 12 | 12 |
| AS206848GB | UKCDN Clouvider Limited | — | 256 | 1 |
| AS215619GB | RCD-AS RED COKE DEVELOPMENT LTD | — | 4 | 4 |
| AS219457GB | Zephyrbash-Labs Evan Galvin | — | 1 | 1 |
| AS213982GB | DISTRICTB-AS Callum Bennett | — | 17 | 2 |
| AS198741GB | AMELIAK Amelia Kalinowska | — | 1 | 1 |
| AS198657GB | GOHEGAN-NET Kai Gohegan | — | 257 | 2 |
| AS58148GB | IRONSIDE Ironside Systems Ltd. | — | 1 | 1 |
| AS206202GB | NAMESERVERPARTY-AS Faelix Limited | — | 1 | 1 |
| AS42192GB | India THUNDER NETWORK LIMITED | — | 1 | 1 |
| AS209507GB | REALLY-AWESOME-TECHNOLOGY Really Awesome Technology LTD | — | 1 | 1 |
| AS56367GB | ALUE-NET ALUE LTD | — | 2 | 2 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS213729GB | RikkiNet Rikki Network Limited | — | 1 | 1 |
| AS214931GB | ALUE-NET ALUE LTD | — | 1 | 1 |
| AS218843GB | OMNIVISION-INTERNET-GATEWAY Omnivision Solutions Ltd | — | 339 | 9 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 2 | 2 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |
| AS219327GB | DISASTER Disaster Limited | — | 1 | 1 |