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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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| AS25178GB | KEYCOM-AS WIFINITY LIMITED | — | — | 0 |
| AS51526GB | IXLEEDS IXLeeds Limited | — | — | 0 |
| AS215768GB | Infected-Systems Alex Haydock | — | 1 | 1 |
| AS47622GB | DATATECHUK Chillishot Ltd | — | — | 0 |
| AS43539GB | DRBSY Roebuck Group Limited | — | — | 0 |
| AS218154GB | nexgen-eu3 NexGen Cloud Ltd | — | — | 0 |
| AS198313GB | SystemHOST Systemhost Limited | — | — | 0 |
| AS49898GB | MYMIND BLOCZ IO LIMITED | — | — | 0 |
| AS47918GB | MCDEU03 MCD Europe Limited | — | — | 0 |
| AS212483GB | level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD | — | 30 | 15 |
| AS50329GB | pbxhosting PBX Hosting Ltd | — | — | 0 |
| AS44874GB | VORBOSS-RD Vorboss Limited | — | — | 0 |
| AS29009GB | UKBROADBAND-AS UK Broadband Ltd. | — | — | 0 |
| AS42192GB | India THUNDER NETWORK LIMITED | — | 1 | 1 |
| AS16166GB | ASWORLDPAY2 WorldPay (UK) Limited | — | — | 0 |
| AS206671GB | NotMike Michael Jones | — | — | 0 |
| AS199843GB | MINDTHECLOUD-AS Mindthecloud Ltd | — | — | 0 |
| AS218940GB | KUMO2 Tealight Ltd | — | 1 | 1 |
| AS213201GB | AS213201 Mathew Philipps | — | — | 0 |
| AS211149GB | legendfibre Talk Straight Ltd. | — | — | 0 |
| AS210516GB | KARMACOMPUTING Karma Computing Ltd | — | — | 0 |
| AS211787GB | Rolosoft-Ltd Rolosoft Limited | — | — | 0 |
| AS202532GB | MBYTECHNOLOGY Mbytechnology Limited | — | — | 0 |
| AS202487GB | HPN HP Networks Ltd | — | — | 0 |
| AS43565GB | JumboIX IPTP LTD | — | — | 0 |
| AS49134GB | AS_10VPN 10VPN Research Network LTD | — | 2 | 2 |
| AS210453GB | VLXTEST VeloxServ Communications Ltd | — | — | 0 |
| AS31595GB | Awell-Wireless-AS Rocket Fibre Ltd | — | — | 0 |
| AS8718GB | Refinitiv Limited | — | — | 0 |
| AS8709GB | VF-VPNPLUS Vodafone Enterprise Equipment Limited | — | — | 0 |
| AS7042GB | UK-ALPHA GamerDating Ltd | — | — | 0 |
| AS218427GB | BROCK-AS BROCK TRADING LTD | — | — | 0 |
| AS216217GB | baltic Baltic Networks Limited | — | — | 0 |
| AS215387GB | A2ES-AS Adrian Fretwell | — | — | 0 |
| AS202751GB | BGP_AS Christopher Edwards | — | 5 | 5 |
| AS211893GB | CTUK-AS CITY TELECOM LTD | — | — | 0 |
| AS213543GB | JONES-LAB Alexander Jones | — | 1 | 1 |
| AS204640GB | impelling Daniel Jackson | — | — | 0 |
| AS201567GB | Cinnabar Vivian Band | — | 1 | 1 |
| AS215413GB | PebbleHost-Protected PebbleHost Ltd | — | — | 0 |
| AS205649GB | TOSLER-NET Shaun Tosler | — | — | 0 |
| AS203902GB | LHBBC-UK Peter Buneman | — | — | 0 |
| AS219441GB | NEKONODE NEKONODE LTD | — | 2 | 2 |
| AS203423GB | innoix INNOIX LTD | — | — | 0 |
| AS203164GB | Traveljigsaw-Ltd Booking.com Transport Limited | — | — | 0 |
| AS199957GB | NATNET Nathan Lasseter | — | — | 0 |