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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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| AS142290GB | AGARTHATELEKOMLTD-AS-AP - AGARTHA TELEKOM LTD | — | 1 | 1 |
| AS60899GB | ATECHMEDIA-AS Krystal Hosting Ltd | — | — | 0 |
| AS49738GB | NX-AS 3nt solutions LLP | — | — | 0 |
| AS51805GB | cantab Gam Systematic LLP | — | — | 0 |
| AS36287GB | IIX-BNIIX-RS - IX Reach Ltd | — | — | 0 |
| AS35143GB | BICOMDOO Bicom Systems Limited | — | — | 0 |
| AS12576GB | EE EE Limited | — | — | 0 |
| AS212180GB | ERL-HSCN Everlight Radiology Limited | — | — | 0 |
| AS202751GB | BGP_AS Christopher Edwards | — | 5 | 5 |
| AS200174GB | AS_WISPEED Wispeed LTD | — | — | 0 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS209149GB | SEEKAHOST SEEKAHOST LTD | — | — | 0 |
| AS202953GB | ukavisbudgetgroup Avis Budget Services Ltd. | — | — | 0 |
| AS202944GB | IXLIV IX Liverpool Limited | — | — | 0 |
| AS201508GB | Connexin Connexin Limited | — | — | 0 |
| AS207140GB | SKYENET Sleat Community Trust | — | — | 0 |
| AS218495GB | mindspit Rhys Jenkins | — | 2 | 2 |
| AS33408GB | WHG-SPARE-1 - World Host Group | — | — | 0 |
| AS24670GB | COHTECH01-AS Coherent Technology Solutions Limited | — | — | 0 |
| AS25346GB | Tiscali-AS TalkTalk Communications Limited | — | — | 0 |
| AS219203GB | CODERWAY-AS Coderway Limited | — | — | 0 |
| AS49134GB | AS_10VPN 10VPN Research Network LTD | — | 2 | 2 |
| AS207120GB | QUICKLINE Quickline Communications Limited | — | — | 0 |
| AS206269GB | Vantage-GB John Hillman | — | — | 0 |
| AS202867GB | Sugarnet Voneus Ltd | — | — | 0 |
| AS52167GB | BANDWIDTH-USA Hydra Communications Ltd | — | — | 0 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS60547GB | Prostack-Hosting Sharpstack Hosting Ltd | — | — | 0 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 28 | 16 |
| AS59621GB | FloNetworks-AS Flo Networks Limited | — | — | 0 |
| AS47718GB | IMSHealth IQVIA SOLUTIONS HQ LTD | — | — | 0 |
| AS47584GB | STELIA Stelia Ltd | — | — | 0 |
| AS43198GB | OUTSOURCERY-AS GCI Network Solutions Limited | — | — | 0 |
| AS50445GB | WIREFAST Wirefast Limited | — | — | 0 |
| AS203164GB | Traveljigsaw-Ltd Booking.com Transport Limited | — | — | 0 |
| AS43251GB | SURFCONTROL-READING Forcepoint Overseas Limited | — | — | 0 |
| AS35082GB | TALKSTRAIGHT-AS Talk Straight Ltd. | — | — | 0 |
| AS41393GB | NASSTAR-AS GCI Network Solutions Limited | — | — | 0 |
| AS8457GB | INDEXSCOPE LIMITED | — | — | 0 |
| AS2529GB | DEMON-INTERNET - IDDQD-AS | — | — | 0 |
| AS213660GB | elisamurphy Elisa Murphy | — | — | 0 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS210961GB | SIGN4 Nathan York | — | 1 | 1 |
| AS206637GB | IQIP-AS CSL (DualCom) Limited | — | — | 0 |
| AS206036GB | DRT-EXCHANGE Digital Realty (UK) Limited | — | — | 0 |
| AS206136GB | CLOUDSRV-NORTH Clouvider Limited | — | — | 0 |