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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 |
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| AS202455GB | CUSHWAKE-NL Cushman & Wakefield Debenham Tie Leung Limited | — | — | 0 |
| AS201038GB | MPARA1 Matteo Paramatti | — | — | 0 |
| AS212391GB | CentralNic-Anycast-K CentralNic Ltd | — | — | 0 |
| AS15565GB | GTT - EMEA Ltd. | — | — | 0 |
| AS202751GB | BGP_AS Christopher Edwards | — | 5 | 5 |
| AS51782GB | VONEUS Voneus Ltd | — | — | 0 |
| AS44754GB | SPACEMINE-AS SpaceMine Ltd | — | — | 0 |
| AS214634GB | AS-BRESSENDEN Bressenden Associates Ltd | — | — | 0 |
| AS39295GB | SWIP-AS Southern Communications Ltd | — | — | 0 |
| AS34716GB | ANIX Timico Managed Services Limited | — | — | 0 |
| AS31665GB | INVESCO-AS Invesco UK Ltd | — | — | 0 |
| AS218827GB | PREMIUM-TECHNOLOGIES PREMIUM TECHNOLOGIES PRIVATE LIMITED | — | — | 0 |
| AS210683GB | syo Syo Limited | — | 1 | 1 |
| AS208576GB | aam-uk Arts Alliance Media Ltd | — | — | 0 |
| AS7042GB | UK-ALPHA GamerDating Ltd | — | — | 0 |
| AS207663GB | PARKIN Paul Parkin | — | — | 0 |
| AS219127GB | risman RISMAN LIMITED | — | — | 0 |
| AS198372GB | wowfi-as Futility Ltd | — | — | 0 |
| AS57932GB | IXLEEDS-ROUTE-SERVER-AS IXLeeds Limited | — | — | 0 |
| AS35375GB | CONSENSUSONE BITNIFTY LTD | — | — | 0 |
| AS35082GB | TALKSTRAIGHT-AS Talk Straight Ltd. | — | — | 0 |
| AS15635GB | YAHOO-UKL Yahoo-UK Limited | — | — | 0 |
| AS218849GB | kent Eximia Networks Limited | — | — | 0 |
| AS209600GB | AS209600 Livefix Technical Solutions Group Limited | — | 32 | 2 |
| AS218282GB | WESTTECH-AS WESTTECH LTD | — | — | 0 |
| AS212885GB | UK-NATWEST-AS212885 Natwest Markets PLC | — | — | 0 |
| AS215388GB | Clevotec Clevotec Limited | — | — | 0 |
| AS209417GB | TIANHAI-EU Tianhai Infotech Ltd | — | — | 0 |
| AS197595GB | SEEKAHOST-TECH SEEKAHOST TECHNOLOGIES LTD | — | — | 0 |
| AS206097GB | gameshield GAMESHIELD LIMITED | — | — | 0 |
| AS212180GB | ERL-HSCN Everlight Radiology Limited | — | — | 0 |
| AS214018GB | IIC-AS INTERNET INTELLIGENCE COMPANY LTD | — | 1 | 1 |
| AS211166GB | asserizyweb LOBOS NETWORKING LTD | — | — | 0 |
| AS198382GB | FIRSTEASY-AS Datum Datacentres Limited | — | — | 0 |
| AS206976GB | KADFIRE Kadfire Limited | — | — | 0 |
| AS51170GB | Natterbox-net Red Matter Limited | — | — | 0 |
| AS49738GB | NX-AS 3nt solutions LLP | — | — | 0 |
| AS42271GB | VANCO-UK-AS3 Flag Telecom UK Limited | — | — | 0 |
| AS13076GB | VIRGINMEDIA Virgin Media Limited | — | — | 0 |
| AS214592GB | GLADELIGHT Gladelight Limited | — | 17 | 2 |
| AS8276GB | VONESERVICES Vone Services Ltd | — | — | 0 |
| AS56367GB | ALUE-NET ALUE LTD | — | 2 | 2 |
| AS43629GB | VM-GCN Virgin Media Limited | — | — | 0 |
| AS211986GB | Athlok-BGP-Collector Athlok Ltd | — | — | 0 |
| AS211284GB | JOSH_MILES Joshua Miles | — | — | 0 |
| AS209035GB | TITANIUM PRT Systems Limited | — | — | 0 |