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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 | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,120 |
| 1 |
| 1 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 3 | 3 |
| AS200104GB | crow You are never Limited | — | 4.1K | 3 |
| AS200708GB | GLASSIO-AS Hugo Rodrigues Da Costa | — | 1 | 1 |
| AS215363GB | Wles Wles Technologies Ltd | — | 257 | 2 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS211224GB | JB3 Joseph Banks | — | 17 | 2 |
| AS212483GB | level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD | — | 32 | 17 |
| AS208589GB | uk123lir ANT BM Limited | — | 1 | 1 |
| AS203766GB | AWILLS Andrew Wills | — | 1 | 1 |
| AS201616GB | theoh-as Theo Holroyd | — | 18 | 3 |
| AS202194GB | HORDEN-ENGINEERING Horden Engineering Limited | — | 1 | 1 |
| AS206848GB | UKCDN Clouvider Limited | — | 256 | 1 |
| AS214592GB | GLADELIGHT Gladelight Limited | — | 17 | 2 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS58052GB | VOLTERIC Volteric Limited | — | 1 | 1 |
| AS214731GB | ETO-AS ETO Networks Limited | — | 601 | 41 |
| AS213436GB | NIUZI_DADA_CLOUD NIUZI DADA CLOUD LIMITED | — | 1K | 1 |
| AS213543GB | JONES-LAB Alexander Jones | — | 1 | 1 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS210387GB | GUARDY Guardy Limited | — | 4.1K | 1 |
| AS207529GB | NyanLoliNetwork NYANLOLI LTD | — | 594 | 20 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS51939GB | TerraMC Terra Management Consulting Ltd | — | 10 | 10 |
| AS214931GB | ALUE-NET ALUE NETWORK LIMITED | — | 1 | 1 |
| AS203054GB | ORG-TCL96-RIPE TownFibre Connect Ltd | — | 1 | 1 |
| AS204931GB | PNOSOLUTIONS-AS PNO Solutions Limited | — | 8 | 2 |
| AS214160GB | SHREE Shreejal Maharjan | — | 3 | 3 |
| AS197166GB | GOTSCHNA-AS Gotschna Limited | — | 2 | 2 |
| AS198768GB | OASISINFO-AS OASIS INFOTECH LIMITED | — | 2 | 2 |
| AS199688GB | CRITPERF-AS Critical Perfect Ltd | — | 16 | 1 |
| AS198657GB | GOHEGAN-NET Kai Gohegan | — | 257 | 2 |
| AS212806GB | stratagem VeloxServ Communications Ltd | — | 64 | 1 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 20 | 12 |
| AS56802GB | DPKGSOFT-AS DpkgSoft International Limited | — | 1 | 1 |
| AS216157GB | SIXNET-OP Sixnet Operation Ltd | — | 65.5K | 1 |
| AS204293GB | TinyHomeLab TinyHomeLab Ltd | — | 1 | 1 |
| AS208485GB | PINHOUSE-AS PINHOUSE LIMITED | — | 1 | 1 |
| AS200455GB | HOTARU-AS HOTARU NETWORK LTD. | — | 178 | 13 |
| AS17626GB | YNL-AS-AP - Yasuda Network LTD | — | 1 | 1 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |
| AS209771GB | SYSN SYSN LTD | — | 2 | 2 |
| AS25085GB | ALUE-NET ALUE NETWORK LIMITED | — | 8 | 8 |
| AS214749GB | PAW James Cahill | — | 6 | 6 |
| AS199794GB | EMO-AS EMOCLOUD LTD | — | 528 | 3 |
| AS202525GB | CHUNMING-AS Chun Ming Ou | — | 3 | 3 |