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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 |
| 1K |
| — |
| 4 |
| AS29754GB | AS29754 Qube Research and Technologies Limited | 1K | — | 4 |
| AS208123GB | SPNA SPN Alliance Limited | 1K | — | 1 |
| AS43442GB | PROVU ProVu Communications Ltd | 1K | 1 | 2 |
| AS59676GB | NETWORKSERVICES-SEC Network Services Ltd. | 1K | 2 | 6 |
| AS208330GB | ASBLX BLX Limited | 1K | — | 1 |
| AS209723GB | AS_Expert EXPERT NETCLOUD LLP | 1K | 524.3K | 3 |
| AS60885GB | zengenti Zengenti Ltd. | 1K | — | 4 |
| AS207543GB | DUG-APIC-AUS DOWNUNDER GEOSOLUTIONS (LONDON) PTY LIMITED | 1K | — | 4 |
| AS198312GB | SPECTRAGROUP Spectra Group (uk) Ltd | 1K | 65.5K | 5 |
| AS200652GB | SIPHON Nuvias UC Limited | 1K | 524.3K | 2 |
| AS210096GB | Stemconnect Stem Connect LTD | 1K | — | 1 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS58101GB | GLADSERV Gladserv Limited | 1K | 65.6K | 6 |
| AS199516GB | PACKNET-AS PACKNET LIMITED | 1K | 524.3K | 5 |
| AS134536GB | ATT-NBE-GB - ATT NBE Equinix London | 1K | — | 4 |
| AS205565GB | BASETELECOMMUNICATIONSLLP Base Telecommunications LLP | 1K | 524.3K | 2 |
| AS197234GB | stylez STYLEZ AI LTD | 1K | — | 4 |
| AS204486GB | CHES-EAST Cheshire East Council | 1K | — | 1 |
| AS20596GB | future Future Publishing Ltd | 1K | 458.8K | 4 |
| AS219469GB | PRIVATEBYTE-MNT PrivateByte Ltd | 1K | 1 | 5 |
| AS60851GB | EMIS-AS Egton Medical Information Systems Limited | 1K | — | 2 |
| AS200124GB | FLEXUK-AS FLEXTRADE UK LIMITED | 1K | — | 4 |
| AS50173GB | VTESSE GTT - EMEA Ltd. | 1K | 2 | 6 |
| AS60593GB | NR-DC-UK-AS Network Rail Infrastructure Limited | 1K | — | 3 |
| AS219369GB | C2T ConstructInTech Limited | 1K | 131.1K | 6 |
| AS51221GB | LMAX-HOSTING LMAX Limited | 1K | — | 1 |
| AS203582GB | mts M-Tech Systems Ltd | 1K | — | 1 |
| AS203460GB | vrdn Village Networks Ltd. | 1K | 524.3K | 2 |
| AS201277GB | Eloquent-AS Eloquent Technologies Ltd | 1K | 524.3K | 2 |
| AS210087GB | ONTIX Ontix Sites No1 Limited | 1K | — | 1 |
| AS47556GB | WEBTIT Webtitude LTD | 1K | 327.7K | 6 |
| AS199946GB | Ctalk Ctalk Limited | 1K | — | 4 |
| AS201664GB | netwarm NetWarm LTD | 1K | — | 4 |
| AS207784GB | HYBIT-SERVICES HybrIT Services Ltd | 1K | — | 4 |
| AS199629GB | NET-4MS 4MS Network Solutions Ltd. | 1K | 65.5K | 5 |
| AS34178GB | Qinetiq Qinetiq Limited | 1K | — | 4 |
| AS204440GB | farmuk STREAMLAND MEDIA UK LIMITED | 1K | — | 4 |
| AS206289GB | sabis TSB BANKING GROUP LIMITED | 1K | — | 4 |
| AS8577GB | xygnition XYGNITION RESEARCH LIMITED | 1K | — | 1 |
| AS208895GB | intelligencehs Intelligence Hosting Services Limited | 1K | — | 1 |
| AS205197GB | kanta Kanta Enterprises Ltd | 1K | — | 1 |
| AS207072GB | NIGSUN Nigsun Limited | 1K | 262.1K | 2 |
| AS51318GB | STANDARD-CHARTERED-BANK-AS STANDARD CHARTERED BANK | 1K | — | 4 |
| AS205734GB | TRAPOC Copart UK Limited | 1K | — | 4 |
| AS202792GB | CLOUD-TRANSIT Clouvider Limited | 1K | — | 4 |
| AS201024GB | DATAWEBGLOBAL-AS DATAWEB GLOBAL LP. | 1K | — | 2 |