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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
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 |
| — |
| 1 |
| 1 |
| AS200143GB | KWZTECH KWZ Technologies Ltd. | — | — | 0 |
| AS213447GB | The-Aster-Institute-of-Education ASTER GLOBAL CO. LTD | — | 1 | 1 |
| AS35662GB | IOMARTHOSTING Iomart Managed Services Limited | — | — | 0 |
| AS29478GB | JUNESTA Karl Dyson | — | 2 | 2 |
| AS24807GB | INFOCOM-AS Redcentric Solutions Ltd | — | — | 0 |
| AS58285GB | ASSIXOP Sixnet Operation Ltd | — | 65.8K | 2 |
| AS28705GB | CYBASE-AS Cybase Limited | — | — | 0 |
| AS201616GB | theoh-as Theo Holroyd | — | 2 | 2 |
| AS56726GB | fouron 4on LTD | — | — | 0 |
| AS199349GB | SphereDent-AS SphereDent LTD | — | — | 0 |
| AS207067GB | Gigasonic Commsworld Ltd | — | 65.5K | 1 |
| AS47584GB | STELIA Stelia Ltd | — | — | 0 |
| AS43198GB | OUTSOURCERY-AS GCI Network Solutions Limited | — | — | 0 |
| AS44366GB | DATACASH-AS MASTERCARD PAYMENT GATEWAY SERVICES GROUP LIMITED | — | — | 0 |
| AS208784GB | ASTLRK TELROCK SYSTEMS LIMITED | — | — | 0 |
| AS208147GB | Snuggle Evie Snuggle | — | — | 0 |
| AS206918GB | DWP Department for Work and Pensions | — | — | 0 |
| AS211131GB | as_globaltechinterapps LOBOS NETWORKING LTD | — | — | 0 |
| AS200365GB | Possibly-Lizards Possibly Lizards Limited | — | 257 | 2 |
| AS20517GB | ASN-TSC1 THE STREAMING COMPANY.COM LIMITED | — | — | 0 |
| AS210870GB | NETJETT NETJETT LTD | — | — | 0 |
| AS211371GB | TELET Telet Research (N.I) Limited | — | — | 0 |
| AS204407GB | Zhero ZHERO Limited | — | — | 0 |
| AS203880GB | HEBNET Hebnet CIC | — | — | 0 |
| AS202027GB | COMMDE 05 COMMUNICATIONS LTD | — | — | 0 |
| AS50461GB | CITYTELECOM City Telecom LTD | — | — | 0 |
| AS215600GB | KTTCARRIER KTT Europe Limited | — | 65.5K | 1 |
| AS16162GB | LONDONWEB London Web Ltd | — | — | 0 |
| AS61972GB | stixinternet STIX Internet Ltd | — | — | 0 |
| AS203276GB | JAMINIT James Cook | — | — | 0 |
| AS47918GB | MCDEU03 MCD Europe Limited | — | — | 0 |
| AS198174GB | VEAN-AS Vean Networks Ltd | — | 1 | 1 |
| AS205006GB | hollandandbarrett Holland & Barrett International Limited | — | — | 0 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 4 | 4 |
| AS203423GB | innoix INNOIX LTD | — | — | 0 |
| AS199843GB | MINDTHECLOUD-AS Mindthecloud Ltd | — | — | 0 |
| AS198796GB | PEARSON-HARPER Phusion IM Limited | — | — | 0 |
| AS197613GB | NMARSHALL-AS Nicholas Marshall | — | 17 | 2 |
| AS200681GB | IXMIDS-ROUTESRV IX Midlands Ltd | — | — | 0 |
| AS216055GB | blue Wren Olivia Wood | — | 1 | 1 |
| AS215905GB | AS_10VPN_ANYCAST 10VPN Research Network LTD | — | — | 0 |
| AS213201GB | AS213201 Mathew Philipps | — | — | 0 |
| AS206307GB | aeromobile Aeromobile Communications Limited | — | — | 0 |
| AS206671GB | NotMike Michael Jones | — | — | 0 |
| AS214984GB | CUHK CUHK LTD. | — | — | 0 |
| AS60160GB | Jefferies-AS Jefferies International Limited | — | — | 0 |