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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 |
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| 0 |
| AS199688GB | CRITPERF-AS Critical Perfect Ltd | — | 16 | 1 |
| AS42271GB | VANCO-UK-AS3 Flag Telecom UK Limited | — | — | 0 |
| AS43336GB | ASPIXIE PIXIE NETWORKS LTD | — | 524.3K | 1 |
| AS207268GB | STREXP STRATEGIC EXPLORATIONS LTD | — | 24 | 6 |
| AS34202GB | CLOUVIDER-THN2 Clouvider Limited | — | 1 | 1 |
| AS15463GB | NETWORKI-AS Virtustream UK Ltd | — | — | 0 |
| AS59893GB | FRC-AS Free Range Cloud Ltd. | — | 4 | 4 |
| AS61024GB | ISP-BACKBONE-LTD Cloud Unboxed Limited | — | — | 0 |
| AS214242GB | Jx Jiaxing Xing | — | 519 | 9 |
| AS50617GB | H3GUK Hutchison 3G UK Limited | — | — | 0 |
| AS215600GB | KTTCARRIER KTT Europe Limited | — | 65.5K | 1 |
| AS49819GB | SHOPZILLAEU Skimbit Ltd | — | — | 0 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS34082GB | YAHOO-AMA Yahoo-UK Limited | — | — | 0 |
| AS35196GB | IH-TRANSIT-AS FIRST SERVER LIMITED | — | 65.5K | 2 |
| AS38973GB | TWANG-AS Digital Space Group Limited | — | — | 0 |
| AS204293GB | TinyHomeLab TinyHomeLab Ltd | — | 1 | 1 |
| AS13144GB | Vodafone-UK-AS Vodafone Limited | — | — | 0 |
| AS203766GB | AWILLS Andrew Wills | — | 1 | 1 |
| AS209869GB | OLLIES_CLOUD Ollie's Cloud LTD | — | — | 0 |
| AS213767GB | RH Richard Humphries | — | 1 | 1 |
| AS213854GB | RESURE RE:SURE INTELLIGENCE LTD | — | — | 0 |
| AS213202GB | The-Cloud-Systems-Group Cloudnet Computing Ltd | — | — | 0 |
| AS211393GB | VITRIFINET Vitrifi Limited | — | — | 0 |
| AS209808GB | LUKE Luke James | — | 64 | 1 |
| AS206987GB | MARCUSNAW Marcus Nawrocki | — | — | 0 |
| AS213434GB | GALACTIX Rhys Woolcott | — | 17 | 2 |
| AS202110GB | TP-PLC Travis Perkins Trading Company Limited | — | — | 0 |
| AS215527GB | XERONET Xero Networks LTD | — | 9 | 9 |
| AS201696GB | SHAMILNET Shamil Nunhuck | — | — | 0 |
| AS212437GB | ADL ADT Defence Limited | — | 524.3K | 1 |
| AS47871GB | ASNMGL Newsquest Media Group Ltd | — | — | 0 |
| AS213771GB | PLATANO-NETWORKS DCC TECH LTD | — | 12 | 4 |
| AS39553GB | BLUEPRINTGAMING Blueprint Gaming Ltd. | — | — | 0 |
| AS204375GB | Adam-Goodenough Adam Goodenough | — | 17 | 2 |
| AS35375GB | CONSENSUSONE BITNIFTY LTD | — | — | 0 |
| AS208589GB | uk123lir ANT BM Limited | — | 1 | 1 |
| AS215499GB | richard-franks Richard Franks | — | — | 0 |
| AS204291GB | pinguin Thomas McLoughlin | — | 337 | 7 |
| AS8457GB | INDEXSCOPE LIMITED | — | — | 0 |
| AS17626GB | YNL-AS-AP - Yasuda Network LTD | — | 1 | 1 |
| AS213863GB | SmartIXPRouteServers SMARTNET LIMITED | — | — | 0 |
| AS210338GB | PIXSAL-AS Kieran Breeze | — | 3 | 3 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS209771GB | SYSN SYSN LTD | — | 2 | 2 |
| AS201164GB | Cool-Studio Cool Studio Limited | — | — | 0 |