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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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 768 |
| — |
| 3 |
| AS206924GB | BENJOJONET Ben Cartwright-Cox | 768 | 8 | 11 |
| AS58051GB | Zume Alpha Internet Limited | 768 | 131.1K | 5 |
| AS203220GB | YAHOO-DEB Yahoo-UK Limited | 768 | 1 | 4 |
| AS44548GB | CMCMarkets-AS CMC MARKETS PLC | 768 | — | 3 |
| AS8336GB | InnovationGrpEMEA THE INNOVATION GROUP (EMEA) LTD | 768 | — | 3 |
| AS205502GB | Inception Inception Hosting Limited | 768 | — | 3 |
| AS204777GB | telent telent Technology Services Ltd | 768 | — | 3 |
| AS206467GB | PROTECH-COMMS Protech Communications Ltd | 768 | — | 3 |
| AS202595GB | SQUIZUS Squiz UK Limited | 768 | — | 2 |
| AS197594GB | REDSTOR-AS Redstor Limited | 768 | — | 3 |
| AS43178GB | TECHNOLABS Technolabs Networks Ltd. | 768 | — | 2 |
| AS59952GB | ExpediaEU Expedia.com Ltd. | 768 | — | 3 |
| AS42853GB | HGCINTL-AS HGC Global Communications (UK) Limited | 768 | — | 2 |
| AS196809GB | FM FremantleMedia Limited | 768 | — | 3 |
| AS202149GB | platformuk Comcast International Holdings UK Limited | 768 | — | 2 |
| AS210511GB | blue-telecoms Direct Market Solutions Limited | 768 | — | 3 |
| AS206689GB | bfc-ty3 Beeks Financial Cloud Ltd | 768 | — | 3 |
| AS214228GB | FPCE-AS Freepoint Commodities Europe LLP | 768 | — | 2 |
| AS214663GB | DanBot-Hosting-LTD DanBot Hosting LTD | 768 | 1 | 4 |
| AS48628GB | CoreISP CoreISP Group Limited | 768 | 524.3K | 4 |
| AS34745GB | TELEWARE TeleWare Hosted Services Ltd. | 768 | — | 2 |
| AS213618GB | ORG-OCL38-RIPE ONESHOME COMMUNICATIONS LTD | 768 | 7.7M | 22 |
| AS206479GB | AceRDP AceRDP Ltd | 768 | — | 3 |
| AS199462GB | NETISP-UK-AS NETISP LTD | 768 | 589.8K | 6 |
| AS210054GB | TNCG NCG Energy Ltd | 768 | 1M | 7 |
| AS201864GB | as-trench MINHOCO 84 LIMITED | 768 | — | 3 |
| AS48804GB | GLOBALSIGN GMO GlobalSign Ltd | 768 | 196.6K | 6 |
| AS208756GB | deas-001 ALCON TELECOM LTD | 768 | — | 2 |
| AS205756GB | JLR JAGUAR LAND ROVER AUTOMOTIVE PLC | 768 | — | 3 |
| AS205294GB | ThermoFisher Thermo Electron Ltd | 768 | — | 2 |
| AS211878GB | ALLSIMPLE All Simple Internet Services LLP | 768 | 1 | 4 |
| AS206357GB | ALDERMORE Aldermore Bank PLC | 768 | — | 2 |
| AS31202GB | QUALCOMM QUALCOMM (UK) LIMITED | 768 | — | 3 |
| AS201664GB | netwarm NetWarm LTD | 768 | — | 3 |
| AS203516GB | AltunHOST AltunHOST LTD | 768 | — | 3 |
| AS54470GB | GCGKABAM - Garden City Games Ltd | 768 | — | 3 |
| AS6911GB | PRO-NET Associated Networks (UK) Limited | 768 | — | 2 |
| AS206069GB | CORNSEED Cornseed Limited | 768 | 3 | 6 |
| AS213482GB | WATERFALL Waterfall Technologies Ltd | 768 | 112 | 10 |
| AS49744GB | INTUIT-UK Intuit Ltd. | 768 | — | 3 |
| AS202791GB | CLOUDSRV-ANY Clouvider Limited | 768 | — | 3 |
| AS202901GB | NETCALL Netcall Technology Limited | 768 | — | 3 |
| AS202548GB | QUADRIS Quadris Ltd | 768 | 524.3K | 4 |
| AS34934GB | UKFast ANS ACADEMY LIMITED | 768 | — | 3 |
| AS49490GB | CIRCLENET-AS Circlenet LLP | 768 | 65.5K | 3 |
| AS203219GB | YAHOO-AMA Yahoo-UK Limited | 768 | 1 | 4 |