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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 |
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| AS15635GB | YAHOO-UKL Yahoo-UK Limited | — | — | 0 |
| AS199944GB | CDS-EMEA Cardinia Real Estate UK Limited | — | — | 0 |
| AS198300GB | FES FES Ltd | — | — | 0 |
| AS62016GB | PSN Virgin Media Limited | — | — | 0 |
| AS202791GB | CLOUDSRV-ANY Clouvider Limited | — | — | 0 |
| AS200499GB | EHL-AS Enterprises Holding LTD | — | 1 | 1 |
| AS2529GB | DEMON-INTERNET - IDDQD-AS | — | — | 0 |
| AS214665GB | PROJECT-PC Adam Beddall | — | — | 0 |
| AS215231GB | volq-capital VolQ Capital Ltd | — | — | 0 |
| AS212391GB | CentralNic-Anycast-K CentralNic Ltd | — | — | 0 |
| AS212295GB | HEYBAS2 Hey Broadband LTD | — | — | 0 |
| AS211209GB | EUROPEANEDGE-IX AIRBYTES COMMUNICATIONS Limited | — | — | 0 |
| AS204407GB | Zhero ZHERO Limited | — | — | 0 |
| AS202235GB | CSD-COMMS UK On-line Agri-sales Limited | — | 65.5K | 1 |
| AS57932GB | IXLEEDS-ROUTE-SERVER-AS IXLeeds Limited | — | — | 0 |
| AS50697GB | ACSN-AS Reliance Cyber Ltd | — | — | 0 |
| AS56739GB | DICO PRT Systems Limited | — | — | 0 |
| AS41393GB | NASSTAR-AS GCI Network Solutions Limited | — | — | 0 |
| AS39553GB | BLUEPRINTGAMING Blueprint Gaming Ltd. | — | — | 0 |
| AS25376GB | NETNORTH-ASN Netnorth Limited | — | — | 0 |
| AS44218GB | CTBY-ASN China Telecom Europe Ltd. | — | — | 0 |
| AS200279GB | DOUWES-NET Thomas Douwes | — | 18 | 3 |
| AS44981GB | Oosha Oosha Ltd | — | — | 0 |
| AS213897GB | BUBBLES-AS BUBBLES ALTER LIMITED | — | 1 | 1 |
| AS203056GB | TTBNGVS TalkTalk Communications Limited | — | — | 0 |
| AS206671GB | NotMike Michael Jones | — | — | 0 |
| AS20500GB | GRIFFIN GTT - EMEA Ltd. | — | — | 0 |
| AS210985GB | BISHOP Christopher Bishop | — | 2 | 2 |
| AS139853GB | NOMINET-AS-AP - NOMINET UK | — | — | 0 |
| AS42987GB | O2Business Virgin Media Limited | — | — | 0 |
| AS61070GB | CDCW-PWC Pricewaterhousecoopers Services Limited | — | — | 0 |
| AS31562GB | OPENMARKET OpenMarket Limited | — | — | 0 |
| AS29506GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS212434GB | ITOGETHER Network Integration Technologies LTD | — | — | 0 |
| AS39192GB | JackNet John Hadrill | — | — | 0 |
| AS211393GB | VITRIFINET Vitrifi Limited | — | — | 0 |
| AS213613GB | BotShield-LTD BOTSHIELD LTD | — | — | 0 |
| AS9156GB | BBC-TRANSIT BBC | — | — | 0 |
| AS213385GB | Look_Web_Hosting_And_Web_Development LOOK WEB HOSTING AND WEB DEVELOPMENT LTD | — | — | 0 |
| AS214705GB | Jamf JAMF LTD | — | — | 0 |
| AS214409GB | ROBOTIC-AS Robotic Node LTD | — | — | 0 |
| AS212992GB | blueprint_as Blueprint Gaming Ltd. | — | — | 0 |
| AS215905GB | AS_10VPN_ANYCAST 10VPN Research Network LTD | — | — | 0 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS205533GB | AMEETECHLTD AMEE TECH LTD | — | — | 0 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |