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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 |
| 1.3K |
| 65.5K |
| 5 |
| AS60492GB | MIMECAST-JE Mimecast Services Limited | 1.3K | — | 5 |
| AS203258GB | UCNS-AS UCNS Limited | 1.3K | — | 5 |
| AS39584GB | LGIM Legal & General Investment Management Holdings Ltd | 1.3K | — | 5 |
| AS200418GB | Uk-Dao Victor Connect Ltd. | 1.3K | — | 4 |
| AS58349GB | INNETRA-AS Elna Paulette Valentin trading as INNETRA PC | 1.3K | — | 4 |
| AS24633GB | XICON BCN Group Hosting Ltd | 1.3K | — | 2 |
| AS210809GB | UniFlex UniFlex Systems Limited | 1.3K | — | 5 |
| AS25588GB | SIXDEGREES-CLOUD-AS Six Degrees Technology Group Limited | 1.3K | — | 4 |
| AS196674GB | SPEEDFLOW-AS Speedflow Communications Ltd | 1.3K | 1 | 6 |
| AS48444GB | INTER-NET-UK Internet Ltd | 1.3K | — | 5 |
| AS39602GB | TCG-AS The Cent.re Group Limited | 1.3K | 524.3K | 5 |
| AS25048GB | DSNet DSNET Ltd | 1.3K | 196.6K | 10 |
| AS202052GB | CTS-GROUP CTS Group Ltd | 1.3K | — | 2 |
| AS56540GB | CONSENSUSONE-AS BITNIFTY LTD | 1.3K | — | 4 |
| AS215128GB | iONLINE-ISP-UK IONLINE INTERNET SOLUTIONS PROVIDER LTD | 1.3K | 524.3K | 5 |
| AS59817GB | OXLETECH Oxletech Limited | 1.3K | 65.5K | 5 |
| AS207765GB | Transit-Networks-Limited Transit Networks Limited | 1.3K | — | 5 |
| AS47318GB | WMAS West Midlands Ambulance Service NHS Foundation Trust | 1.3K | — | 4 |
| AS205311GB | Cambridge_Fibre_Networks Cambridge Fibre Networks Ltd. | 1.3K | 524.3K | 3 |
| AS9179GB | OFFICENET OfficeNet Systems Limited | 1.3K | — | 2 |
| AS15622GB | uk-frontline Frontline Consultancy and Business Services Limited | 1.3K | — | 4 |
| AS203851GB | as_csd001 CSD Network Services Ltd | 1.3K | — | 5 |
| AS59717GB | ARCO-AS Arco Limited | 1.3K | 524.3K | 3 |
| AS215304GB | SOLREN SOLREN LIMITED | 1.3K | — | 5 |
| AS31050GB | FRAMESTORE The Framestore Limited | 1.3K | — | 5 |
| AS47572GB | TICKETMASTER-EU2 Ticketmaster UK Limited | 1.3K | — | 5 |
| AS199828GB | Inet-Plc-AS NUSO CLOUD UK LIMITED | 1.3K | — | 2 |
| AS21346GB | VISTORM-AS Enterprise Services Information Security UK Limited | 1.3K | — | 5 |
| AS199566GB | DATAPASA-AS DataPasa Limited | 1.3K | 1 | 6 |
| AS213790GB | LimitedNetwork-AS Limited Network LTD | 1.3K | — | 5 |
| AS208697GB | KMSL-AS Kellogg Management Services (Europe) Limited | 1.3K | — | 5 |
| AS219141GB | ROCKET-MARINICA ROCKET & MARINICA LTD | 1.3K | — | 5 |
| AS213513GB | COMPUTLE Computle Limited | 1.3K | 524.3K | 6 |
| AS60962GB | BZ Foreign and Commonwealth Office | 1.3K | — | 3 |
| AS210101GB | cyber Cyber Pathogen Ltd | 1.3K | — | 2 |
| AS209553GB | NETVAZ NETVAZ LIMITED | 1.3K | 4 | 9 |
| AS219113GB | Databridges-as Databridges Technologies Ltd. | 1.3K | — | 5 |
| AS215674GB | BROOKPLUS-LIMITED Brookplus Limited | 1.3K | — | 5 |
| AS210310GB | PCT-Pure-IP Daisy Communications Ltd | 1.3K | — | 2 |
| AS2129GB | DXC-AS2129 EntServ UK Limited | 1.3K | — | 2 |
| AS43924GB | IQUO IQUO LIMITED | 1.3K | — | 4 |
| AS200636GB | PARAVIRT Paravirt LTD | 1.5K | — | 6 |
| AS12761GB | COLT-CORP-IT COLT Technology Services Group Limited | 1.5K | — | 6 |
| AS60228GB | C24-AS Six Degrees Technology Group Limited | 1.5K | 98.3K | 4 |
| AS204321GB | uk-nyt-cdg1 New York Times Limited | 1.5K | — | 3 |
| AS197283GB | PowerRDP-Network-AS PowerRDP Network LTD | 1.5K | — | 6 |