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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.
3,134 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
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| AS60257GB | OB-Telecom-Limited TalkTalk Communications Limited | — | — | 0 |
| AS62346GB | XTRAKTER-LTD-ASN MARKETAXESS POST-TRADE LIMITED | — | — | 0 |
| AS200143GB | KWZTECH KWZ Technologies Ltd. | — | — | 0 |
| AS200919GB | SMETSOMAPP-as SMETSOMAPP LTD | — | — | 0 |
| AS205586GB | MOIDART HALE KAI LIMITED | — | — | 0 |
| AS198567GB | ED-AND-F-MAN-HOLDINGS-AS MCML LIMITED | — | — | 0 |
| AS8689GB | POWERNETUK Digital Space Group Limited | — | — | 0 |
| AS198276GB | Lazuline Jordan Robert | — | 2 | 2 |
| AS8553GB | AVENSYS Avensys Networks Ltd | — | — | 0 |
| AS45828GB | WORLDREACH Hello World Ltd | — | — | 0 |
| AS57932GB | IXLEEDS-ROUTE-SERVER-AS IXLeeds Limited | — | — | 0 |
| AS209264GB | IVX Ivx Group Ltd | — | 1 | 1 |
| AS214705GB | Jamf JAMF LTD | — | — | 0 |
| AS215661GB | ANIXNICS ANIXNICS LIMITED | — | — | 0 |
| AS218849GB | kent Eximia Networks Limited | — | — | 0 |
| AS219032GB | PapilioHost Papilio Host Ltd | — | — | 0 |
| AS35082GB | TALKSTRAIGHT-AS Talk Straight Ltd. | — | — | 0 |
| AS8897GB | KCOM-SPN KCOM Group Limited | — | — | 0 |
| AS25127GB | BTOW British Telecommunications Limited | — | — | 0 |
| AS206792GB | ZACH Zachary Buller | — | 16 | 1 |
| AS39451GB | IOMART-AS Iomart Managed Services Limited | — | — | 0 |
| AS59621GB | FloNetworks-AS Flo Networks Limited | — | — | 0 |
| AS204660GB | Tiger-Technologies-Limited Tiger Technologies Limited | — | 1 | 1 |
| AS199349GB | SphereDent-AS SphereDent LTD | — | — | 0 |
| AS201280GB | five9uk FIVE9 INC UK LIMITED | — | — | 0 |
| AS209869GB | OLLIES_CLOUD Ollie's Cloud LTD | — | — | 0 |
| AS213085GB | LOGINELTDAS Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS12554GB | EASYNET-BE GTT - EMEA Ltd. | — | — | 0 |
| AS8835GB | VITRIFI Vitrifi Limited | — | — | 0 |
| AS34158GB | BBC-RD-NONUK-AS BBC | — | — | 0 |
| AS39139GB | Menzies-Aviation-PLC-AS Menzies Aviation Plc | — | — | 0 |
| AS213863GB | SmartIXPRouteServers SMARTNET LIMITED | — | — | 0 |
| AS219311GB | wavemobile Wave Mobile Ltd | — | — | 0 |
| AS60899GB | ATECHMEDIA-AS Krystal Hosting Ltd | — | — | 0 |
| AS61135GB | TR-SUNUCUCOM TIGOVA NETWORK LIMITED | — | — | 0 |
| AS199398GB | LDNFLATS-AS LDNFLATS LTD | — | — | 0 |
| AS214242GB | Jx Jiaxing Xing | — | 519 | 9 |
| AS197976GB | FAVBET-AS Favbet Invest LLP | — | — | 0 |
| AS201762GB | RBK-AS Royal Borough of Kingston Council | — | — | 0 |
| AS205441GB | LUMO Lumo Cloud Limited | — | — | 0 |
| AS206976GB | KADFIRE Kadfire Limited | — | — | 0 |
| AS211658GB | STRATUS_AS Unity World Ltd | — | — | 0 |
| AS219035GB | AHEADUK AHEAD UK Solutions Ltd | — | — | 0 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS2529GB | DEMON-INTERNET - IDDQD-AS | — | — | 0 |
| AS12640GB | COLT Technology Services Group Limited | — | — | 0 |