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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 |
| 4.9K |
| — |
| 6 |
| AS203919GB | LumaDock-AS LUMADOCK LTD | 4.9K | — | 19 |
| AS29219GB | SAQ-UK-AS SEMTEC LIMITED | 4.9K | — | 7 |
| AS61337GB | ECOM-AS Single Mode Networks Ltd | 4.9K | 1 | 13 |
| AS199404GB | WHG-IN WHG Hosting Services Ltd | 4.9K | — | 19 |
| AS60949GB | AS-4XSOLUTIONS 4x Solutions UK LTD | 4.9K | — | 19 |
| AS51059GB | BRIGHTBOX-AS Brightbox Systems Ltd | 5.1K | 65.5K | 6 |
| AS211121GB | India Tiger Network Limited | 5.1K | — | 5 |
| AS201739GB | METRANET-AS Metranet Communications Ltd. | 5.1K | — | 14 |
| AS199448GB | NTE-AS Babble Cloud Holdings Ltd. | 5.1K | — | 4 |
| AS61049GB | EXASCALE Exascale Ltd | 5.1K | 327.9K | 23 |
| AS39875GB | W3Z Zycomm Electronics Limited | 5.1K | — | 2 |
| AS210814GB | VUNIFY VUNIFY LTD | 5.1K | — | 20 |
| AS31712GB | GIGASTREAM-AS Gigastream Limited | 5.1K | — | 3 |
| AS50746GB | BTL Britannic Technologies Ltd | 5.1K | — | 3 |
| AS49375GB | AS-NOONEINTERNET No One Internet Ltd | 5.1K | 524.3K | 19 |
| AS59597GB | FOURCOM 4COM TECHNOLOGIES LIMITED | 5.1K | 589.8K | 9 |
| AS203443GB | INDERTCONNECTION INDERT CONNECTION LP | 5.1K | 524.3K | 10 |
| AS197173GB | HIGHLIGHT-NET HIGHLIGHT APPS LTD | 5.1K | — | 20 |
| AS212171GB | Local-as Local NCC Ltd. | 5.1K | — | 19 |
| AS36218GB | WHG-CAN WHG Hosting Services Ltd | 5.1K | — | 10 |
| AS25335GB | NGS NEXT GLOBAL SERVICES L.P. | 5.1K | — | 11 |
| AS25585GB | KENCOMP Kencomp Internet Ltd | 5.1K | — | 2 |
| AS207916GB | Velocity1UK Velocity1 Limited | 5.1K | — | 5 |
| AS29033GB | ECKOH Eckoh UK Limited | 5.1K | 4 | 6 |
| AS29664GB | RGCOM-VANCO-HAI Flag Telecom UK Limited | 5.4K | — | 5 |
| AS213529GB | SCULK-AS Sculk Ltd. | 5.4K | 18 | 23 |
| AS34816GB | AEG Anschutz Sports Holdings Limited | 5.4K | 65.5K | 6 |
| AS213603GB | hullfibre Hull Fibre Ltd | 5.4K | 524.3K | 4 |
| AS56696GB | ASLIQUID-MPLS Liquid Telecommunications Ltd | 5.4K | — | 21 |
| AS199542GB | SONASSI Iomart Managed Services Limited | 5.4K | — | 21 |
| AS13005GB | C2INTERNET Atlas Business Group of Companies Ltd | 5.4K | 65.5K | 13 |
| AS206934GB | BFC-UK Beeks Financial Cloud Ltd | 5.4K | — | 18 |
| AS20652GB | UNITRON-AS Unitron Systems & Development LTD | 5.6K | — | 4 |
| AS218964GB | QUATTRO-AS QUATTRO APPS LTD | 5.6K | — | 22 |
| AS34790GB | AS34790 TFM NETWORKS LIMITED | 5.6K | — | 3 |
| AS31493GB | TWENTYTWENTYMEDIA-AS TWENTYTWENTYMEDIA LIMITED | 5.6K | 65.5K | 5 |
| AS50023GB | Vodat VCG TECHNOLOGY SERVICES LIMITED | 5.6K | — | 6 |
| AS56990GB | SYSCOMM Syscomm Limited | 5.6K | 524.3K | 7 |
| AS206300GB | YUNYOO YUNYOO LTD | 5.6K | 4 | 15 |
| AS198798GB | OFLI-AS OFFICE LIMITED | 5.6K | 2 | 13 |
| AS59778GB | SYNEXTRA-UK Synextra Limited | 5.6K | — | 13 |
| AS212743GB | ETERNITY-AS ETERNITY INTERNATIONAL LIMITED | 5.6K | 1 | 21 |
| AS201497GB | express-as STAT EXPRESS SERVICES LTD | 5.6K | — | 7 |
| AS49592GB | PIPE-NET Pipe Networks LTD | 5.6K | 66 | 28 |
| AS16096GB | betfair The Sporting Exchange (Clients) Ltd | 5.6K | — | 22 |
| AS199452GB | MS3-AS MS3 Networks Ltd | 5.6K | — | 5 |