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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
| 4.9K |
| 65.5K |
| 20 |
| AS218661GB | ACO-TECH-AS ACO TECH SERVICES LTD | 4.9K | — | 19 |
| AS205098GB | CGUK Cloud Gateway Limited | 4.9K | — | 9 |
| AS196778GB | TFL Transport for London | 4.9K | — | 3 |
| AS43108GB | GARM-AS GARMTECH LP | 4.9K | — | 6 |
| AS29219GB | SAQ-UK-AS SEMTEC LIMITED | 4.9K | — | 7 |
| AS199404GB | WHG-IN WHG Hosting Services Ltd | 4.9K | — | 19 |
| AS31712GB | GIGASTREAM-AS Gigastream Limited | 5.1K | — | 3 |
| AS51059GB | BRIGHTBOX-AS Brightbox Systems Ltd | 5.1K | 65.5K | 6 |
| AS50746GB | BTL Britannic Technologies Ltd | 5.1K | — | 3 |
| AS207916GB | Velocity1UK Velocity1 Limited | 5.1K | — | 5 |
| AS199742GB | Akenai-Products-AS Akenai Products LTD | 5.1K | 40 | 60 |
| AS197758GB | NXLAYER NXLayer Ltd | 5.1K | 524.3K | 18 |
| AS36218GB | WHG-CAN WHG Hosting Services Ltd | 5.1K | — | 10 |
| AS39875GB | W3Z Zycomm Electronics Limited | 5.1K | — | 2 |
| AS52025GB | PARADOXNETWORKS-LIMITED ParadoxNetworks Limited | 5.1K | 594 | 86 |
| AS203919GB | LumaDock-AS LUMADOCK LTD | 5.1K | — | 20 |
| AS61049GB | EXASCALE Exascale Ltd | 5.1K | 327.9K | 23 |
| AS203443GB | INDERTCONNECTION INDERT CONNECTION LP | 5.1K | 524.3K | 10 |
| AS201739GB | METRANET-AS Metranet Communications Ltd. | 5.1K | — | 14 |
| AS25335GB | NGS NEXT GLOBAL SERVICES L.P. | 5.1K | — | 11 |
| AS199448GB | NTE-AS Babble Cloud Holdings Ltd. | 5.1K | — | 4 |
| AS25585GB | KENCOMP Kencomp Internet Ltd | 5.1K | — | 2 |
| AS15753GB | BP-US-2 BP International Ltd | 5.1K | — | 14 |
| AS212194GB | Yuusei YUUSEI LTD | 5.1K | 3 | 11 |
| AS29033GB | ECKOH Eckoh UK Limited | 5.1K | 4 | 6 |
| AS49375GB | AS-NOONEINTERNET No One Internet Ltd | 5.1K | 524.3K | 19 |
| AS59597GB | FOURCOM 4COM TECHNOLOGIES LIMITED | 5.1K | 589.8K | 9 |
| AS34816GB | AEG Anschutz Sports Holdings Limited | 5.4K | 65.5K | 6 |
| AS203758GB | EUGameHost-LTD EUGAMEHOST LTD | 5.4K | — | 21 |
| AS199542GB | SONASSI Iomart Managed Services Limited | 5.4K | — | 21 |
| AS213603GB | hullfibre Hull Fibre Ltd | 5.4K | 524.3K | 4 |
| AS29664GB | RGCOM-VANCO-HAI Flag Telecom UK Limited | 5.4K | — | 5 |
| AS206934GB | BFC-UK Beeks Financial Cloud Ltd | 5.4K | — | 18 |
| AS31459GB | BBC-RD-AS BBC | 5.4K | — | 4 |
| AS13005GB | C2INTERNET Atlas Business Group of Companies Ltd | 5.4K | 65.5K | 13 |
| AS56990GB | SYSCOMM Syscomm Limited | 5.6K | 524.3K | 7 |
| AS16032GB | TIBUS-ULTRAFAST The Internet Business Ltd | 5.6K | — | 5 |
| AS44403GB | BRISTOL-CITY-COUNCIL Bristol City Council | 5.6K | — | 8 |
| AS50023GB | Vodat VCG TECHNOLOGY SERVICES LIMITED | 5.6K | — | 6 |
| AS31493GB | TWENTYTWENTYMEDIA-AS TWENTYTWENTYMEDIA LIMITED | 5.6K | 65.5K | 5 |
| AS199452GB | MS3-AS MS3 Networks Ltd | 5.6K | — | 5 |
| AS198798GB | OFLI-AS OFFICE LIMITED | 5.6K | 2 | 13 |
| AS16096GB | betfair The Sporting Exchange (Clients) Ltd | 5.6K | — | 22 |
| AS56696GB | ASLIQUID-MPLS Liquid Telecommunications Ltd | 5.6K | — | 22 |
| AS199550GB | HIRAGI-LTD HIRAGI LTD | 5.6K | — | 22 |
| AS20652GB | UNITRON-AS Unitron Systems & Development LTD | 5.6K | — | 4 |