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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.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,120 |
| — |
| 22 |
| 6 |
| AS3344GB | BURSTFIRE Burstfire Networks Ltd | — | — | 0 |
| AS198768GB | OASISINFO-AS OASIS INFOTECH LIMITED | — | 2 | 2 |
| AS8716GB | ASINCORE Redcentric Solutions Ltd | — | — | 0 |
| AS201335GB | SEVENNET-UK Seven Networking UK Ltd | — | 4 | 4 |
| AS214160GB | SHREE Shreejal Maharjan | — | 3 | 3 |
| AS47669GB | MEDIA365-AS Hestview Limited | — | — | 0 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS34026GB | IXBIRMINGHAM Nuco Technologies Ltd | — | — | 0 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 3 | 3 |
| AS44308GB | VAPOURMEDIA-AS Vapour Media Limited | — | — | 0 |
| AS200707GB | APPMAIL Integrated Digital Services Ltd | — | 65.5K | 1 |
| AS198064GB | ZEROPACKETS-LTD ZEROPACKETS LTD | — | — | 0 |
| AS205474GB | CARR Jack Carr | — | 1 | 1 |
| AS49182GB | BTEngageIT British Telecommunications PLC | — | — | 0 |
| AS60714GB | TELNA-UK TELNA (UK) LTD | — | — | 0 |
| AS35736GB | WUK-AS EE Limited | — | — | 0 |
| AS213982GB | DISTRICTB-AS Callum Bennett | — | 17 | 2 |
| AS214242GB | Jx Jiaxing Xing | — | 519 | 9 |
| AS56758GB | CR0BAR Cr0bar Limited | — | 6 | 6 |
| AS12870GB | AHSYS Arrowhead Systems Ltd | — | — | 0 |
| AS203766GB | AWILLS Andrew Wills | — | 1 | 1 |
| AS205749GB | Intelligent-Communitycations-125-Ltd INTELLIGENT COMMUNITYCATIONS 125 LTD | — | — | 0 |
| AS204994GB | BAHAMUT-ZONE Luke Seabrook | — | 1 | 1 |
| AS202489GB | SDHL Shop Direct Holdings Limited | — | — | 0 |
| AS17626GB | YNL-AS-AP - Yasuda Network LTD | — | 1 | 1 |
| AS214634GB | AS-BRESSENDEN Bressenden Associates Ltd | — | — | 0 |
| AS213660GB | elisamurphy Elisa Murphy | — | — | 0 |
| AS216157GB | SIXNET-OP Sixnet Operation Ltd | — | 65.5K | 1 |
| AS201824GB | stat-cons-as STAT CONSULTING LTD | — | 1 | 1 |
| AS204725GB | luna-frankland Luna Frankland | — | 1 | 1 |
| AS25314GB | CCUK1 Clear Connect Limited | — | — | 0 |
| AS214731GB | ETO-AS ETO Networks Limited | — | 601 | 41 |
| AS8686GB | SYSONLINE Digital Space Group Limited | — | — | 0 |
| AS47326GB | KTT-CARRIER-ASN KTT Carrier Limited | — | 65.6K | 3 |
| AS31535GB | PROMONTORIA-AS Promontoria Ltd | — | — | 0 |
| AS202751GB | BGP_AS Christopher Edwards | — | 1 | 1 |
| AS214819GB | BUZZSTER Buzzster Ltd | — | — | 0 |
| AS201567GB | Cinnabar Vivian Band | — | 1 | 1 |
| AS198535GB | NET-8E3 8E3 NETWORKS LTD | — | — | 0 |
| AS198657GB | GOHEGAN-NET Kai Gohegan | — | 257 | 2 |
| AS207663GB | PARKIN Paul Parkin | — | — | 0 |
| AS207135GB | Giotsas Vasileios Giotsas | — | 2 | 2 |
| AS61341GB | NASSTAR-MPLS-AS GCI Network Solutions Limited | — | — | 0 |
| AS197166GB | GOTSCHNA-AS Gotschna Limited | — | 2 | 2 |
| AS148971GB | KEIBIIN-AS-AP - Keibiin's Holdings Limited | — | 313 | 13 |
| AS199519GB | THATGUYJACK-NET Jack Brierley | — | 8 | 8 |