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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 |
| 4.4K |
| 2 |
| 19 |
| AS9084GB | GSI-AS Goldman Sachs International | 4.4K | — | 17 |
| AS200904GB | FOXCLOUD FOXCLOUD LLP | 4.4K | — | 17 |
| AS203758GB | EUGameHost-LTD EUGAMEHOST LTD | 4.4K | — | 17 |
| AS41231GB | CANONICAL-AS Canonical Group Limited | 4.4K | 11 | 27 |
| AS47998GB | OSCARMUSIC Oscar Music & Media Ltd. | 4.1K | 65.5K | 2 |
| AS204239GB | UK-Abzorb Abzorb Group Ltd | 4.1K | — | 4 |
| AS214438GB | nexgen-ca1 NexGen Cloud Ltd | 4.1K | — | 16 |
| AS44671GB | SKYLINE-ASN Skyline Networks & Consultancy Ltd | 4.1K | 65.5K | 4 |
| AS30847GB | LUNS-AS Lancaster University Network Services Limited | 4.1K | 65.5K | 2 |
| AS39202GB | GCAP-AS Global Radio Limited | 4.1K | 65.5K | 2 |
| AS21218GB | EBCGROUP EBC Group (UK) Ltd | 4.1K | — | 1 |
| AS47351GB | REDTECH Red Technology Solutions Limited | 4.1K | — | 4 |
| AS16376GB | SYSGROUP-PLC SysGroup plc | 4.1K | — | 4 |
| AS39060GB | SAINSBURYS-NET Sainsbury's Supermarkets Ltd | 4.1K | — | 3 |
| AS39620GB | ngbaileyit-uk NG BAILEY IT SERVICES LIMITED | 4.1K | — | 1 |
| AS201126GB | CDW-UK-AS CDW Ltd | 4.1K | — | 12 |
| AS202575GB | UNI-HULL University of Hull | 4.1K | — | 1 |
| AS214271GB | QTNETWORK QT NETWORK LTD | 4.1K | — | 16 |
| AS41896GB | SHETTEL-AS Shetland Islands Council | 4.1K | — | 10 |
| AS28886GB | RETN-LV RETN Limited | 4.1K | 65.5K | 2 |
| AS44791GB | KINLY-AS AVMI KINLY LTD | 4.1K | — | 2 |
| AS59659GB | SECURUS Securus Communications Ltd. | 4.1K | 524.3K | 4 |
| AS25343GB | COVENTRY-AS Coventry University Computing Services | 4.1K | — | 1 |
| AS15770GB | DERWENTSIDE Durham County Council | 4.1K | — | 1 |
| AS59953GB | PUREFIBRE-AS Purefibre Internet Ltd. | 4.1K | 524.3K | 4 |
| AS44521GB | Jagex-as Jagex Limited | 4.1K | — | 14 |
| AS8789GB | NOV-AS TELEFONICA TECH NORTHERN IRELAND LIMITED | 4.1K | — | 1 |
| AS205039GB | BeaconBroadband Beacon Broadband LTD | 4.1K | — | 16 |
| AS39630GB | Asptech Asptech IT Solutions Ltd | 4.1K | — | 9 |
| AS29120GB | ROWEMAW-AS Mayer Brown International LLP | 4.1K | — | 10 |
| AS59565GB | CRONOS-AS Cronos Internet Ltd | 4.1K | 65.5K | 4 |
| AS197574GB | EXPRESSHOST ExpressHost Ltd | 4.1K | — | 16 |
| AS196881GB | LIBERTY-AS Liberty-izone Ltd | 4.1K | 524.3K | 6 |
| AS15692GB | RAZORBLUE Razorblue Ltd | 4.1K | 524.3K | 14 |
| AS35825GB | GUARDIAN-AS Guardian News and Media Limited | 4.1K | — | 9 |
| AS203446GB | AS203446 SMARTNET LIMITED | 4.1K | 5 | 21 |
| AS205220GB | RHC-Hosting RH & Co. IT Services Ltd | 4.1K | — | 16 |
| AS210258GB | Wildanet Wildanet Ltd | 4.1K | 775.2K | 70 |
| AS51905GB | CWCS-VM Compuweb Communications Services Limited | 4.1K | — | 9 |
| AS31198GB | Space-Norway-UK-Ltd SPACE NORWAY (UK) LIMITED | 4.1K | — | 8 |
| AS211140GB | TRANSUNION-INTERNATIONAL-UK-LIMITED TRANSUNION INTERNATIONAL UK LIMITED | 4.1K | — | 9 |
| AS15572GB | Cybertrust Verizon UK Limited | 4.1K | 1 | 16 |
| AS203231GB | V4VoIP Vanquish Global Trading Ltd | 4.1K | — | 1 |
| AS207567GB | INTEZIONET-AS Intezio Worldwide Limited | 4.1K | 263 | 24 |
| AS6838GB | FLIRBLE-AS Christopher Luke | 4.1K | 30 | 24 |
| AS60297GB | CG-UK Capgemini UK plc | 4.1K | 512 | 14 |