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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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| AS205517GB | HCBC-AS Highland Community Broadband C.I.C. | — | — | 0 |
| AS204725GB | luna-frankland Luna Frankland | — | — | 0 |
| AS56758GB | CR0BAR Cr0bar Limited | — | 6 | 6 |
| AS8709GB | VF-VPNPLUS Vodafone Enterprise Equipment Limited | — | — | 0 |
| AS7042GB | UK-ALPHA GamerDating Ltd | — | — | 0 |
| AS49134GB | AS_10VPN 10VPN Research Network LTD | — | 2 | 2 |
| AS218427GB | BROCK-AS BROCK TRADING LTD | — | — | 0 |
| AS216217GB | baltic Baltic Networks Limited | — | — | 0 |
| AS215387GB | A2ES-AS Adrian Fretwell | — | — | 0 |
| AS200499GB | EHL-AS Enterprises Holding LTD | — | 1 | 1 |
| AS211893GB | CTUK-AS CITY TELECOM LTD | — | — | 0 |
| AS210453GB | VLXTEST VeloxServ Communications Ltd | — | — | 0 |
| AS204640GB | impelling Daniel Jackson | — | — | 0 |
| AS8718GB | Refinitiv Limited | — | — | 0 |
| AS215413GB | PebbleHost-Protected PebbleHost Ltd | — | — | 0 |
| AS205649GB | TOSLER-NET Shaun Tosler | — | — | 0 |
| AS203902GB | LHBBC-UK Peter Buneman | — | — | 0 |
| AS203423GB | innoix INNOIX LTD | — | — | 0 |
| AS203164GB | Traveljigsaw-Ltd Booking.com Transport Limited | — | — | 0 |
| AS199957GB | NATNET Nathan Lasseter | — | — | 0 |
| AS199843GB | MINDTHECLOUD-AS Mindthecloud Ltd | — | — | 0 |
| AS219018GB | gb-ducky Droidhub LTD | — | 1 | 1 |
| AS198313GB | SystemHOST Systemhost Limited | — | — | 0 |
| AS49898GB | MYMIND BLOCZ IO LIMITED | — | — | 0 |
| AS204069GB | AG-Host AG Host LTD | — | — | 0 |
| AS219441GB | NEKONODE NEKONODE LTD | — | 2 | 2 |
| AS219212GB | HYW-AS HYW COMMUNICATIONS LTD | — | — | 0 |
| AS218742GB | BASIC-SCRIPT-LTD BASIC SCRIPT LIMITED | — | — | 0 |
| AS216442GB | uk-ngaconnect NGA Connect Limited | — | — | 0 |
| AS208589GB | uk123lir ANT BM Limited | — | — | 0 |
| AS208585GB | CSSUK Clear Street Services UK LTD | — | — | 0 |
| AS206745GB | Shawdex Shawdex Ltd | — | — | 0 |
| AS205281GB | NF-CLOUD1 Otava Tech LTD | — | — | 0 |
| AS212483GB | level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD | — | 30 | 15 |
| AS204853GB | SurreyHillsInternet HFLBroadband Ltd | — | — | 0 |
| AS29478GB | JUNESTA Karl Dyson | — | 2 | 2 |
| AS201038GB | MPARA1 Matteo Paramatti | — | — | 0 |
| AS42192GB | India THUNDER NETWORK LIMITED | — | 1 | 1 |
| AS200614GB | VRTS-GPK COHESITY INTERNATIONAL UK LIMITED | — | — | 0 |
| AS199269GB | UK-ARDENTA-ASN Claranet Limited | — | — | 0 |
| AS51782GB | VONEUS Voneus Ltd | — | — | 0 |
| AS218940GB | KUMO2 Tealight Ltd | — | 1 | 1 |
| AS50930GB | REDINET Redinet Limited | — | — | 0 |
| AS34716GB | ANIX Timico Managed Services Limited | — | — | 0 |
| AS34041GB | BMA-ORG-UK British Medical Association | — | — | 0 |
| AS31595GB | Awell-Wireless-AS Rocket Fibre Ltd | — | — | 0 |