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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 | 4,127 |
| 1K |
| — |
| 1 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS204264GB | PUREIP Pure IP Limited | 1K | — | 1 |
| AS59402GB | Virocom Virocom Limited | 1K | 524.3K | 2 |
| AS206078GB | UltraNetworks UltraNetworks Limited | 1K | — | 4 |
| AS209447GB | RETN-TR-AS RETN Limited | 1K | — | 1 |
| AS212890GB | AetherCloud ONEMAN NETWORK LIMITED | 1K | 5 | 9 |
| AS207245GB | DSTI-ASN DSTI Holdings Limited | 1K | — | 1 |
| AS58101GB | GLADSERV Gladserv Limited | 1K | 65.6K | 6 |
| AS205197GB | kanta Kanta Enterprises Ltd | 1K | — | 1 |
| AS59676GB | NETWORKSERVICES-SEC Network Services Ltd. | 1K | 2 | 6 |
| AS204236GB | uk-div011 Daniel Ionita | 1K | — | 1 |
| AS62145GB | Bango BANGO.NET Ltd | 1K | — | 4 |
| AS202241GB | BDC-London Business Design Centre Ltd | 1K | — | 1 |
| AS213441GB | SLAYER-AS SLAYER GROUP LIMITED | 1K | — | 4 |
| AS198306GB | AESL1 AIG Europe (Services) Limited | 1K | — | 3 |
| AS41281GB | KEFF KeFF Networks Ltd | 1K | 2 | 6 |
| AS57650GB | NOMIOS-ASN Nomios UK&I Limited | 1K | 524.3K | 2 |
| AS205389GB | ZOOM-INTERNET Zoom Internet Ltd | 1K | 65.5K | 2 |
| AS56850GB | AKARI-AS Akari Networks Ltd | 1K | — | 1 |
| AS204598GB | AS-VILLAGENETWORKS Village Networks Ltd. | 1K | 524.3K | 4 |
| AS206467GB | PROTECH-COMMS Protech Communications Ltd | 768 | — | 3 |
| AS59952GB | ExpediaEU Expedia.com Ltd. | 768 | — | 3 |
| AS197669GB | CLOUDCALL-UK-AS CloudCall LTD | 768 | 3 | 6 |
| AS50743GB | Commensus-Ltd-AS Commensus Limited | 768 | — | 3 |
| AS214351GB | FEMOIT FEMO IT SOLUTIONS LIMITED | 768 | — | 3 |
| AS60952GB | connexcs Connex Carrier Services (Worldwide) Limited | 768 | — | 3 |
| AS205294GB | ThermoFisher Thermo Electron Ltd | 768 | — | 2 |
| AS201864GB | as-trench MINHOCO 84 LIMITED | 768 | — | 3 |
| AS211058GB | threatspike-cloud-uk ThreatSpike Labs Limited | 768 | — | 3 |
| AS212240GB | RIKNETWORKS RIK Networks Ltd | 768 | — | 3 |
| AS42853GB | HGCINTL-AS HGC Global Communications (UK) Limited | 768 | — | 2 |
| AS204928GB | AS-BONSAIHOST Bonsai Hosting ltd | 768 | 65.5K | 4 |
| AS8296GB | HBVB HBVB Private Unlimited | 768 | — | 3 |
| AS43178GB | TECHNOLABS Technolabs Networks Ltd. | 768 | — | 2 |
| AS206479GB | AceRDP AceRDP Ltd | 768 | — | 3 |
| AS202364GB | gridh Grid Hosting Limited | 768 | — | 3 |
| AS207009GB | UK-FUTURE Future Publishing Ltd | 768 | 65.5K | 3 |
| AS41415GB | square-enix Square Enix Limited | 768 | — | 3 |
| AS35437GB | zonebroadband Zone Telecommunications Ltd | 768 | — | 2 |
| AS203219GB | YAHOO-AMA Yahoo-UK Limited | 768 | 1 | 4 |
| AS204767GB | PRIVATE-DATACENTER VIRTUAL PRIVATE SERVER DATACENTER LIMITED | 768 | — | 3 |
| AS39389GB | GTRL Gibson Thomas Rental Ltd | 768 | — | 2 |
| AS43428GB | YAHOO-ULS Yahoo-UK Limited | 768 | 1 | 4 |
| AS196809GB | FM FremantleMedia Limited | 768 | — | 3 |
| AS208118GB | NI-Technology-Ltd N.I Technology Ltd. | 768 | — | 3 |
| AS59907GB | IMSHealth IQVIA SOLUTIONS HQ LTD | 768 | — | 3 |