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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
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| AS198276GB | Lazuline Jordan Robert | — | 1 | 1 |
| AS60788GB | VARIDION Gamma Network Solution Limited | — | — | 0 |
| AS216364GB | uk-globalreachtech Global Reach Technology EMEA Limited | — | 8.2K | 2 |
| AS197166GB | GOTSCHNA-AS Gotschna Limited | — | 2 | 2 |
| AS201038GB | MPARA1 Matteo Paramatti | — | 1 | 1 |
| AS56979GB | fulcrum Fulcrum Data Systems Ltd | — | — | 0 |
| AS213447GB | The-Aster-Institute-of-Education ASTER GLOBAL CO. LTD | — | 1 | 1 |
| AS203031GB | AKIX-RS AKAERE NETWORKS TECHNOLOGY LTD | — | — | 0 |
| AS207427GB | IBILLY-MEDIA-GROUP-LTD IBILLY MEDIA GROUP LTD | — | 1 | 1 |
| AS196875GB | NASSTAR-MON-AS GCI Network Solutions Limited | — | — | 0 |
| AS202076GB | SCOTTISHFIBRE Fibre Networks (Scotland) Limited | — | 21 | 3 |
| AS196628GB | EFAR-Manchester Southern Communications Ltd | — | — | 0 |
| AS200455GB | HOTARU-AS HOTARU NETWORK LTD. | — | 178 | 13 |
| AS48973GB | Netplan SysGroup plc | — | — | 0 |
| AS201567GB | Cinnabar Vivian Band | — | 1 | 1 |
| AS50617GB | H3GUK Hutchison 3G UK Limited | — | — | 0 |
| AS206392GB | HACKWORTH_UK Hackworth Ltd | — | 50 | 4 |
| AS42192GB | India THUNDER NETWORK LIMITED | — | — | 0 |
| AS204789GB | BizbetaLTD BIZBETA LTD | — | 68.6K | 17 |
| AS43367GB | IWEB-HOSTING Interactive Web Solutions Ltd | — | — | 0 |
| AS210387GB | GUARDY Guardy Limited | — | 4.1K | 1 |
| AS216116GB | vivoenergy-as Vivo Energy Ltd | — | — | 0 |
| AS205474GB | CARR Jack Carr | — | 1 | 1 |
| AS5622GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 20 | 12 |
| AS215071GB | SERVERSWITCH Server Switch Limited | — | — | 0 |
| AS210338GB | PIXSAL-AS Kieran Breeze | — | 3 | 3 |
| AS215474GB | BIIL-RU-AS BIIL RU LTD | — | — | 0 |
| AS200371GB | freedomsatuk Bentley-Walker Limited | — | 1 | 1 |
| AS214665GB | PROJECT-PC Adam Beddall | — | — | 0 |
| AS207135GB | Giotsas Vasileios Giotsas | — | 2 | 2 |
| AS208147GB | Snuggle Evie Snuggle | — | — | 0 |
| AS58339GB | MARIA-AS MARIA STYLE LTD | — | 704 | 33 |
| AS45828GB | WORLDREACH Hello World Ltd | — | — | 0 |
| AS206000GB | HRE Harry Rowan Elenor | — | 257 | 2 |
| AS44218GB | CTBY-ASN China Telecom Europe Ltd. | — | — | 0 |
| AS51939GB | TerraMC Terra Management Consulting Ltd | — | 10 | 10 |
| AS50871GB | IXBRADFORD IXBRADFORD LIMITED | — | — | 0 |
| AS58148GB | IRONSIDE Ironside Systems Ltd. | — | 1 | 1 |
| AS21493GB | PKXGEU GTT - EMEA Ltd. | — | — | 0 |
| AS201616GB | theoh-as Theo Holroyd | — | 2 | 2 |
| AS2529GB | DEMON-INTERNET - IDDQD-AS | — | — | 0 |
| AS204291GB | pinguin Thomas McLoughlin | — | 337 | 7 |
| AS215002GB | PRISMGG PRISM.GG Limited | — | 80 | 2 |
| AS208589GB | uk123lir ANT BM Limited | — | 1 | 1 |
| AS205441GB | LUMO Lumo Cloud Limited | — | — | 0 |