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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.
3,134 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 | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
| 3.6K |
| 2 |
| 16 |
| AS35707GB | Scottish-Power-PLC Scottish Power UK PLC | 3.6K | — | 5 |
| AS213354GB | International-Hosting-Solutions-AS INTERNATIONAL HOSTING SOLUTIONS LLP | 3.6K | 256 | 7 |
| AS28939GB | ARM-AS ARM Ltd | 3.6K | — | 14 |
| AS24594GB | FSYS Voiceflex Ltd | 3.6K | 65.5K | 5 |
| AS56382GB | VSERVERLTD vServer.site LTD | 3.6K | 23 | 22 |
| AS42705GB | Talia Talia Limited | 3.6K | — | 14 |
| AS21301GB | UK-NATWEST-AS21301 Natwest Markets PLC | 3.8K | — | 10 |
| AS41203GB | GEOPOST DPDgroup UK Ltd | 3.8K | — | 8 |
| AS29400GB | TULLETT-AS TP ICAP GROUP SERVICES LIMITED | 3.8K | — | 13 |
| AS25421GB | JOHN-LEWIS-AS John Lewis Plc. | 3.8K | — | 9 |
| AS200751GB | Entigy Entigy Ltd | 3.8K | — | 4 |
| AS198823GB | NETINT Network Integration Technologies LTD | 3.8K | — | 5 |
| AS50113GB | SuperServersDatacenter FIRST SERVER LIMITED | 3.8K | 786.5K | 38 |
| AS41495GB | FAELIX Faelix Limited | 3.8K | 655.4K | 8 |
| AS30938GB | abstation ahbr company limited | 3.8K | — | 5 |
| AS8282GB | BINK Bink Group Ltd | 3.8K | 65.5K | 11 |
| AS205220GB | RHC-Hosting RH & Co. IT Services Ltd | 3.8K | — | 15 |
| AS216039GB | AntiDDoS-pw EdgeSec Technologies Limited | 3.8K | 129 | 18 |
| AS39208GB | IPILimited I.P. Integration Limited | 3.8K | 589.8K | 11 |
| AS197574GB | EXPRESSHOST ExpressHost Ltd | 3.8K | — | 15 |
| AS20878GB | AS-ATIA MeetingZone Limited | 3.8K | — | 5 |
| AS205098GB | CGUK Cloud Gateway Limited | 3.8K | — | 7 |
| AS15770GB | DERWENTSIDE Durham County Council | 4.1K | — | 1 |
| AS203231GB | V4VoIP Vanquish Global Trading Ltd | 4.1K | — | 1 |
| AS200660GB | QONZER QONZER LTD | 4.1K | — | 16 |
| AS39620GB | ngbaileyit-uk NG BAILEY IT SERVICES LIMITED | 4.1K | — | 1 |
| AS44671GB | SKYLINE-ASN Skyline Networks & Consultancy Ltd | 4.1K | 65.5K | 4 |
| AS51905GB | CWCS-VM Compuweb Communications Services Limited | 4.1K | — | 9 |
| AS196881GB | LIBERTY-AS Liberty-izone Ltd | 4.1K | 524.3K | 6 |
| AS47351GB | REDTECH Red Technology Solutions Limited | 4.1K | — | 4 |
| AS30847GB | LUNS-AS Lancaster University Network Services Limited | 4.1K | 65.5K | 2 |
| AS204239GB | UK-Abzorb Abzorb Group Ltd | 4.1K | — | 4 |
| AS209336GB | GBWS GB Wholesale Networks LTD | 4.1K | 1 | 11 |
| AS60297GB | CG-UK Capgemini UK plc | 4.1K | 512 | 14 |
| AS31459GB | BBC-RD-AS BBC | 4.1K | — | 1 |
| AS202575GB | UNI-HULL University of Hull | 4.1K | — | 1 |
| AS8789GB | NOV-AS TELEFONICA TECH NORTHERN IRELAND LIMITED | 4.1K | — | 1 |
| AS25343GB | COVENTRY-AS Coventry University Computing Services | 4.1K | — | 1 |
| AS35825GB | GUARDIAN-AS Guardian News and Media Limited | 4.1K | — | 9 |
| AS35200GB | TransitX-Ltd TransitX Ltd | 4.1K | 65.5K | 17 |
| AS198037GB | SPACECORE SPACECORE SOLUTION LTD | 4.1K | 12.3K | 20 |
| AS44791GB | KINLY-AS KINLY UK LTD | 4.1K | — | 2 |
| AS201126GB | CDW-UK-AS CDW Ltd | 4.1K | — | 12 |
| AS28886GB | RETN-LV RETN Limited | 4.1K | 65.5K | 2 |
| AS39630GB | Asptech Asptech IT Solutions Ltd | 4.1K | — | 9 |
| AS59659GB | SECURUS Securus Communications Ltd. | 4.1K | 524.3K | 4 |