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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 |
| — |
| 1 |
| 1 |
| AS12708GB | OneTel-AS TalkTalk Communications Limited | — | — | 0 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |
| AS203397GB | curveit CURVE INFORMATION TECHNOLOGY LIMITED | — | — | 0 |
| AS218940GB | KUMO2 Tealight Ltd | — | 1 | 1 |
| AS212902GB | KKL Kustom Konsulting Limited | — | — | 0 |
| AS212483GB | level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD | — | 30 | 15 |
| AS213803GB | AS-Xray Xray Network Ltd | — | — | 0 |
| AS213507GB | SKYQUANTUM-TELECOM SKYQUANTUM TELECOM LTD. | — | 1.4M | 44 |
| AS204000GB | YAHOO-LOB Yahoo-UK Limited | — | — | 0 |
| AS214409GB | ZEKTRA-AS Zektra Networks Ltd | — | — | 0 |
| AS9786GB | XIANDOUCLOUD1-AS-AP - XIANDOUCLOUD INFORMATION TECHNOLOGY LTD | — | 1 | 1 |
| AS199349GB | SphereDent-AS SphereDent LTD | — | — | 0 |
| AS59621GB | FloNetworks-AS Flo Networks Limited | — | — | 0 |
| AS60547GB | Prostack-Hosting Sharpstack Hosting Ltd | — | — | 0 |
| AS5622GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS5571GB | NETCOM GTT - EMEA Ltd. | — | — | 0 |
| AS218639GB | CogniTransit CogniCloud Ltd | — | — | 0 |
| AS8689GB | POWERNETUK Digital Space Group Limited | — | — | 0 |
| AS209022GB | Tschajera-Limited Tschajera Limited | — | 4.1K | 16 |
| AS203945GB | ThomasFranklin-AS Thomas Franklin | — | — | 0 |
| AS12471GB | TelstraEuropeLtd-DEDICATED-HOSTING TELSTRA UK LIMITED | — | — | 0 |
| AS15482GB | GTT - EMEA Ltd. | — | — | 0 |
| AS218697GB | itv-studios-uk ITV Services Limited | — | — | 0 |
| AS215913GB | NetLab Chun Ming Ou | — | — | 0 |
| AS206210GB | MS-AMLIN MS Amlin Underwriting Limited | — | — | 0 |
| AS202110GB | TP-PLC Travis Perkins Trading Company Limited | — | — | 0 |
| AS47326GB | KTT-CARRIER-ASN KTT Carrier Limited | — | 65.6K | 3 |
| AS47718GB | IMSHealth IQVIA SOLUTIONS HQ LTD | — | — | 0 |
| AS215159GB | RokosServicesUK Rokos Services (UK) Limited | — | — | 0 |
| AS34407GB | WAVECREST-AS01 Wavecrest Networks Limited | — | — | 0 |
| AS205552GB | AS_BITS LOTS OF BITS LTD | — | — | 0 |
| AS214168GB | SIXMANCHESTER Sixnet Operation Ltd | — | 65.5K | 1 |
| AS55212GB | IIX-WVIIX-RS - IX Reach Ltd | — | — | 0 |
| AS199519GB | THATGUYJACK-NET Jack Brierley | — | 9 | 9 |
| AS44874GB | VORBOSS-RD Vorboss Limited | — | — | 0 |
| AS16166GB | ASWORLDPAY2 WorldPay (UK) Limited | — | — | 0 |
| AS6763GB | SKY-GROUP-BACKBONE-AS Sky UK Limited | — | — | 0 |
| AS213729GB | RikkiNet Rikki Network Limited | — | 1 | 1 |
| AS28816GB | CHESS-ICT-MAN Chess ICT Ltd | — | — | 0 |
| AS200927GB | ProxyOmega ProxyOmega LTD | — | 65.5K | 1 |
| AS202488GB | balticbroadband Baltic Broadband Limited | — | — | 0 |
| AS199746GB | SHRDSERV SharedServ Ltd | — | — | 0 |
| AS60677GB | DLG DL Insurance Services Limited | — | — | 0 |
| AS60945GB | VELOXSERV-LEGACY VeloxServ Communications Ltd | — | — | 0 |
| AS201316GB | AIGLOBALMEDIALTD A.I. Global Media Ltd | — | — | 0 |
| AS210467GB | Alncom ALNWICK COMPUTERWARE LTD. | — | — | 0 |