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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 |
| 257 |
| 2 |
| AS198276GB | ARPERLA Jordan Robert | — | 2 | 2 |
| AS202194GB | HORDEN-ENGINEERING Horden Engineering Limited | — | 1 | 1 |
| AS215002GB | PRISMGG PRISM.GG Limited | — | 80 | 2 |
| AS209507GB | REALLY-AWESOME-TECHNOLOGY Really Awesome Technology LTD | — | 1 | 1 |
| AS213543GB | JONES-LAB Alexander Jones | — | 1 | 1 |
| AS219361GB | SHIKANOKO-NETWORKS SHIKANOKO NETWORKS LTD | — | 1 | 1 |
| AS51939GB | TerraMC Terra Management Consulting Ltd | — | 28 | 13 |
| AS219441GB | NEKONODE NEKONODE LTD | — | 2 | 2 |
| AS203766GB | AWILLS Andrew Wills | — | 1 | 1 |
| AS211224GB | JB3 Joseph Banks | — | 17 | 2 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS215158GB | SIXNET-OP2 Sixnet Operation Ltd | — | 65.5K | 1 |
| AS214818GB | WILL-WILSON William Wilson | — | 9 | 5 |
| AS215499GB | richard-franks Richard Franks | — | 1 | 1 |
| AS199688GB | CRITPERF-AS Critical Perfect Ltd | — | 16 | 1 |
| AS17626GB | YNL-AS-AP - Yasuda Network LTD | — | 1 | 1 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 2 | 2 |
| AS201616GB | theoh-as Theo Holroyd | — | 2 | 2 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |
| AS218212GB | GuernseyOnline Hosting Ltd. | — | 1 | 1 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS201164GB | Cool-Studio Cool Studio Limited | — | 257 | 2 |
| AS49962GB | ALUE-NET ALUE LTD | — | 2 | 2 |
| AS214749GB | PAW James Cahill | — | 6 | 6 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 28 | 16 |
| AS200455GB | HOTARU-AS HOTARU NETWORK LTD. | — | 162 | 12 |
| AS42192GB | India THUNDER NETWORK LIMITED | — | 1 | 1 |
| AS206202GB | NAMESERVERPARTY-AS Faelix Limited | — | 1 | 1 |
| AS199804GB | TFES-AS THE FIRST EAST STAR LTD | — | 1 | 1 |
| AS56367GB | ALUE-NET ALUE LTD | — | 2 | 2 |
| AS212806GB | stratagem VeloxServ Communications Ltd | — | 64 | 1 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS207529GB | NyanLoliNetwork NYANLOLI LTD | — | 571 | 12 |
| AS212483GB | level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD | — | 30 | 15 |
| AS204660GB | Tiger-Technologies-Limited Tiger Technologies Limited | — | 1 | 1 |
| AS209601GB | XiaoYuanNET XiaoYuan Networks Limited | — | 6 | 6 |
| AS214931GB | ALUE-NET ALUE LTD | — | 1 | 1 |
| AS208485GB | PINHOUSE-AS PINHOUSE LIMITED | — | 1 | 1 |
| AS218843GB | OMNIVISION-INTERNET-GATEWAY Omnivision Solutions Ltd | — | 339 | 9 |
| AS219370GB | Johnson Benjamin Johnson | — | 22 | 7 |
| AS216157GB | SIXNET-OP Sixnet Operation Ltd | — | 65.5K | 1 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS218671GB | WALKOWSKI-AS Lukasz Walkowski | — | 1 | 1 |
| AS209771GB | SYSN SYSN LTD | — | 5 | 5 |
| AS215368GB | CONNORMCF Connor McFarlane | — | 1 | 1 |
| AS214592GB | GLADELIGHT Gladelight Limited | — | 17 | 2 |