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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 |
| 256 |
| 524.3K |
| 2 |
| AS213565GB | Badonde-Networks David Davies | 256 | 65.5K | 3 |
| AS60914GB | TelecomsConsortiumLtd Telecoms Consortium Ltd. | 256 | — | 1 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS34900GB | CME-AS-LO2-2 CME Operations Limited | 256 | — | 1 |
| AS16339GB | VI-UK Virtual Internet (UK) Limited | 256 | — | 1 |
| AS201694GB | RethinkTS Rethink Technology Solutions Ltd | 256 | — | 1 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS202359GB | glauca-carrier AS207960 Cyfyngedig | 256 | 5 | 6 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS203108GB | iTouchVision iTouch Vision LTD | 256 | — | 1 |
| AS200425GB | BG-TAL Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |
| AS49606GB | MCDEU01 MCD Europe Limited | 256 | — | 1 |
| AS214294GB | NoobNet NOOB RP LTD | 256 | 2 | 3 |
| AS197355GB | UK-FOREX-AS Stratos Markets Limited | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS200416GB | BG-MED Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS49728GB | HEREFORDSHIRE-COUNCIL Herefordshire Council | 256 | — | 1 |
| AS201323GB | host-media-ltd Host Media Ltd | 256 | 65.5K | 2 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS197284GB | K3X-MNT K3X SYSTEMS Ltd | 256 | 1 | 2 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 256 | 1 | 2 |
| AS206939GB | YOSPACE Yospace Technologies Ltd | 256 | 1 | 2 |
| AS205615GB | SSC SS&C Solution Limited | 256 | — | 1 |
| AS202306GB | HOSTGLOBALPLUS-AS HOSTGLOBAL.PLUS LTD | 256 | 17 | 3 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS43851GB | LWBNET Etheroute Ltd | 256 | 1 | 2 |
| AS209734GB | STARFALL STARFALL DISTRIBUTION LTD | 256 | — | 1 |
| AS42875GB | NCP-AS National Car Parks Limited | 256 | — | 1 |
| AS211829GB | Zaha ZAHA HADID LIMITED | 256 | — | 1 |
| AS57672GB | DJA-ASN Daniel James Austin | 256 | 1 | 2 |
| AS59809GB | AS21IN Numeric Futures Limited | 256 | — | 1 |
| AS210216GB | hcluk-as-ms HCL Technologies UK Limited | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS205855GB | EG-AS Evolution Gaming LTD | 256 | — | 1 |
| AS205676GB | DCE Data Center Experts LTD | 256 | — | 1 |
| AS208150GB | uk-eagle Eagle Aquila Ltd | 256 | — | 1 |
| AS206530GB | VOXYONDER VOXYONDER NETWORK SERVICES UK LTD | 256 | — | 1 |
| AS211803GB | AS_INTER_ACT CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS33879GB | FORTHS-PORTS-PLC Forth Ports Public Limited Company | 256 | — | 1 |
| AS50888GB | MINOTAUR-ASN Minotaur I.T. Limited | 256 | — | 1 |
| AS213798GB | POWELL-AS Jude Gabriel Powell | 256 | 282 | 13 |
| AS199330GB | CENTRALNIC-ANYCAST-A CentralNic Ltd | 256 | 1 | 2 |
| AS20915GB | HUNDRED-PERCENT-IT CYBERHIVE LTD | 256 | — | 1 |
| AS51946GB | NEWCASTLE-UNI-NUSAJAYA-CAMPUS University of Newcastle upon Tyne | 256 | — | 1 |