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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.
3,132 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
| 4.4K |
| 65.5K |
| 18 |
| AS41383GB | wolasn Wolseley UK Limited | 4.4K | — | 9 |
| AS199058GB | SERVAONE SERVA ONE LTD | 4.4K | — | 17 |
| AS57653GB | CTL-AS Central Technology Ltd | 4.4K | 65.5K | 7 |
| AS215000GB | CountryConnect Country Connect Ltd | 4.4K | 524.3K | 13 |
| AS197107GB | BlueChip SERVICE EXPRESS EUROPE LIMITED | 4.4K | — | 17 |
| AS50910GB | MAINSTREAM-BIRM1-AS Mainstream Digital Ltd | 4.4K | — | 11 |
| AS57022GB | DATAVITA-AS HFD DATAVITA LIMITED | 4.1K | 1 | 13 |
| AS196881GB | LIBERTY-AS Liberty-izone Ltd | 4.1K | 524.3K | 6 |
| AS8789GB | NOV-AS TELEFONICA TECH NORTHERN IRELAND LIMITED | 4.1K | — | 1 |
| AS39630GB | Asptech Asptech IT Solutions Ltd | 4.1K | — | 9 |
| AS16376GB | SYSGROUP-PLC SysGroup plc | 4.1K | — | 4 |
| AS44671GB | SKYLINE-ASN Skyline Networks & Consultancy Ltd | 4.1K | 65.5K | 4 |
| AS218862GB | DIGITALZERO-MNT DIGITAL ZERO ONE LTD | 4.1K | — | 16 |
| AS31459GB | BBC-RD-AS BBC | 4.1K | — | 1 |
| AS214266GB | ZERODESK-LTD ZERODESK LTD | 4.1K | 12.9M | 45 |
| AS21218GB | EBCGROUP EBC Group (UK) Ltd | 4.1K | — | 1 |
| AS200658GB | CoreCloud CoreCloud Systems Ltd | 4.1K | — | 16 |
| AS198037GB | SPACECORE SPACECORE SOLUTION LTD | 4.1K | 12.3K | 20 |
| AS203231GB | V4VoIP Vanquish Global Trading Ltd | 4.1K | — | 1 |
| AS60542GB | NEXT Next Internet Network Ltd | 4.1K | — | 16 |
| AS6838GB | FLIRBLE-AS Christopher Luke | 4.1K | 30 | 24 |
| AS15770GB | DERWENTSIDE Durham County Council | 4.1K | — | 1 |
| AS59565GB | CRONOS-AS Cronos Internet Ltd | 4.1K | 65.5K | 4 |
| AS205039GB | BeaconBroadband Beacon Broadband LTD | 4.1K | — | 16 |
| AS59953GB | PUREFIBRE-AS Purefibre Internet Ltd. | 4.1K | 524.3K | 4 |
| AS39060GB | SAINSBURYS-NET Sainsbury's Supermarkets Ltd | 4.1K | — | 3 |
| AS44521GB | Jagex-as Jagex Limited | 4.1K | — | 14 |
| AS15692GB | RAZORBLUE Razorblue Ltd | 4.1K | 524.3K | 14 |
| AS31198GB | Space-Norway-UK-Ltd SPACE NORWAY (UK) LIMITED | 4.1K | — | 8 |
| AS35825GB | GUARDIAN-AS Guardian News and Media Limited | 4.1K | — | 9 |
| AS15572GB | Cybertrust Verizon UK Limited | 4.1K | 1 | 16 |
| AS35200GB | TransitX-Ltd TransitX Ltd | 4.1K | — | 16 |
| AS214438GB | nexgen-ca1 NexGen Cloud Ltd | 4.1K | — | 16 |
| AS200660GB | QONZER QONZER LTD | 4.1K | — | 16 |
| AS20976GB | HOTLINKS-AS Domainmaster LTD | 4.1K | — | 1 |
| AS210258GB | Wildanet Wildanet Ltd | 4.1K | 774.1K | 69 |
| AS30847GB | LUNS-AS Lancaster University Network Services Limited | 4.1K | 65.5K | 2 |
| AS47998GB | OSCARMUSIC Oscar Music & Media Ltd. | 4.1K | 65.5K | 2 |
| AS60297GB | CG-UK Capgemini UK plc | 4.1K | 512 | 14 |
| AS214271GB | QTNETWORK ICONIC PROTECH LTD | 4.1K | — | 16 |
| AS201126GB | CDW-UK-AS CDW Ltd | 4.1K | — | 12 |
| AS51905GB | CWCS-VM Compuweb Communications Services Limited | 4.1K | — | 9 |
| AS39620GB | ngbaileyit-uk NG BAILEY IT SERVICES LIMITED | 4.1K | — | 1 |
| AS211140GB | TRANSUNION-INTERNATIONAL-UK-LIMITED TRANSUNION INTERNATIONAL UK LIMITED | 4.1K | — | 9 |
| AS29120GB | ROWEMAW-AS Mayer Brown International LLP | 4.1K | — | 10 |
| AS218829GB | DIGITALITCREATIONS-MNT Digital IT Creations Ltd | 4.1K | — | 16 |