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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 |
| 1K |
| — |
| 1 |
| AS201289GB | ESENDEX COMMIFY UK LIMITED | 1K | — | 1 |
| AS202212GB | DWEBS-AS DWebs Ltd | 1K | 65.5K | 2 |
| AS34178GB | Qinetiq Qinetiq Limited | 1K | — | 4 |
| AS215925GB | VPSVAULTHOST VPSVAULT.HOST LTD | 1K | 16 | 5 |
| AS201024GB | DATAWEBGLOBAL-AS DATAWEB GLOBAL LP. | 1K | — | 2 |
| AS8577GB | xygnition XYGNITION RESEARCH LIMITED | 1K | — | 1 |
| AS215674GB | BROOKPLUS-LIMITED Brookplus Limited | 1K | — | 4 |
| AS209274GB | Kraken-Network-ISP Kraken Network ISP LTD | 1K | — | 4 |
| AS213078GB | wifiscotland WiFi Scotland LLP | 1K | 524.3K | 2 |
| AS50432GB | RBS-GBM-UKSTAFF Natwest Markets PLC | 1K | — | 3 |
| AS60011GB | MYTHIC-BEASTS-USA Mythic Beasts Ltd | 1K | 131.1K | 6 |
| AS51601GB | IPTP IPTP LTD | 1K | 4.1K | 3 |
| AS213549GB | SATISFYHOST SATISFYHOST LTD | 1K | 2 | 6 |
| AS208311GB | BOURNELEISURE Bourne Leisure Limited | 1K | — | 1 |
| AS207511GB | LONDSTOCK-APAC London Stock Exchange PLC | 1K | — | 3 |
| AS39520GB | SD-TECHOPS-NL Satcom Direct International Ltd. | 1K | — | 1 |
| AS197234GB | stylez STYLEZ AI LTD | 1K | — | 4 |
| AS199946GB | Ctalk Ctalk Limited | 1K | — | 4 |
| AS206289GB | sabis TSB BANKING GROUP LIMITED | 1K | — | 4 |
| AS50468GB | CITRUS-AS CITRUS TELECOMMUNICATIONS LTD | 1K | — | 4 |
| AS62244GB | WBTSUK-AS Watch Tower Bible and Tract Society of Britain | 1K | 65.5K | 2 |
| AS202787GB | withers-global Withers LLP | 1K | — | 4 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS205767GB | Spectron-Services Spectron Services Limited | 1K | — | 1 |
| AS15418GB | IONOS-ANYCAST Fasthosts Internet Limited | 1K | 2 | 2 |
| AS201277GB | Eloquent-AS Eloquent Technologies Ltd | 1K | 524.3K | 2 |
| AS215286GB | IXROOT IXROOT LTD | 768 | — | 3 |
| AS203219GB | YAHOO-AMA Yahoo-UK Limited | 768 | 1 | 4 |
| AS59907GB | IMSHealth IQVIA SOLUTIONS HQ LTD | 768 | — | 3 |
| AS205502GB | Inception Inception Hosting Limited | 768 | — | 3 |
| AS206479GB | AceRDP AceRDP Ltd | 768 | — | 3 |
| AS197669GB | CLOUDCALL-UK-AS CloudCall LTD | 768 | 3 | 6 |
| AS206357GB | ALDERMORE Aldermore Bank PLC | 768 | — | 2 |
| AS35437GB | zonebroadband Zone Telecommunications Ltd | 768 | — | 2 |
| AS204928GB | AS-BONSAIHOST Bonsai Hosting ltd | 768 | 65.5K | 4 |
| AS60952GB | connexcs Connex Carrier Services (Worldwide) Limited | 768 | — | 3 |
| AS214467GB | digided-as DIGIDED LTD | 768 | — | 3 |
| AS203070GB | YAHOO-FRA Yahoo-UK Limited | 768 | 1 | 4 |
| AS196809GB | FM FremantleMedia Limited | 768 | — | 3 |
| AS202364GB | gridh Grid Hosting Limited | 768 | — | 3 |
| AS206187GB | DIA-ASN Interactive Investor Services Limited | 768 | — | 3 |
| AS48090GB | DMZHOST TECHOFF SRV LIMITED | 768 | — | 3 |
| AS42853GB | HGCINTL-AS HGC Global Communications (UK) Limited | 768 | — | 2 |
| AS214351GB | FEMOIT FEMO IT SOLUTIONS LIMITED | 768 | — | 3 |
| AS210495GB | WENIUM WENIUM LTD | 768 | 16 | 4 |
| AS25546GB | BROOKLANDCOMP-AS Brookland Computer Services Limited | 768 | — | 2 |