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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 | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 968.4K | 3,979 |
| 768 |
| — |
| 3 |
| AS204928GB | AS-BONSAIHOST Bonsai Hosting ltd | 768 | 65.5K | 4 |
| AS34745GB | TELEWARE TeleWare Hosted Services Ltd. | 768 | — | 2 |
| AS200552GB | ACKLO Acklo Ltd | 768 | — | 3 |
| AS40992GB | MAREX Marex Financial Ltd | 768 | — | 2 |
| AS197462GB | UPHOST-AS UPHOST SOLUTIONS LIMITED | 768 | — | 3 |
| AS208756GB | deas-001 ALCON TELECOM LTD | 768 | — | 2 |
| AS203861GB | MITEFLUX-AS Miteflux Technologies Ltd | 768 | — | 3 |
| AS43408GB | OCD-UK Orange Cyberdefense UK Limited | 768 | 1 | 4 |
| AS212169GB | TECH-RMMINET CARDOCK HOSTING LIMITED | 768 | — | 3 |
| AS48553GB | MARKETAXESS Marketaxess Europe Ltd | 768 | — | 3 |
| AS35437GB | zonebroadband Zone Telecommunications Ltd | 768 | — | 2 |
| AS205294GB | ThermoFisher Thermo Electron Ltd | 768 | — | 2 |
| AS204777GB | telent telent Technology Services Ltd | 768 | — | 3 |
| AS9140GB | HYPERNEPH Hyperneph Ltd | 768 | — | 3 |
| AS42853GB | HGCINTL-AS HGC Global Communications (UK) Limited | 768 | — | 2 |
| AS64415GB | CONNECTBIT-AS Ashgoal Limited | 768 | — | 3 |
| AS196809GB | FM FremantleMedia Limited | 768 | — | 3 |
| AS43525GB | TRENCHANT-AS Oculon LLP | 768 | — | 3 |
| AS210054GB | TNCG NCG Energy Ltd | 768 | 1M | 7 |
| AS50156GB | BOXED-IT Boxed IT Ltd. | 768 | 1 | 3 |
| AS215657GB | Hachette-UK Hachette UK Limited | 768 | — | 2 |
| AS49911GB | AS-CDNSQUARED CDN Squared Limited | 768 | — | 3 |
| AS25546GB | BROOKLANDCOMP-AS Brookland Computer Services Limited | 768 | — | 2 |
| AS202149GB | platformuk Comcast International Holdings UK Limited | 768 | — | 2 |
| AS59907GB | IMSHealth IQVIA SOLUTIONS HQ LTD | 768 | — | 3 |
| AS211878GB | ALLSIMPLE All Simple Internet Services LLP | 768 | 1 | 4 |
| AS203036GB | GPS-2 THREDD UK LIMITED | 768 | — | 2 |
| AS203057GB | ORG-VL468-RIPE VillageNet Ltd | 768 | 1 | 4 |
| AS15490GB | SHANEMCC Shane Mc Cormack | 768 | 524.3K | 3 |
| AS207009GB | UK-FUTURE Future Publishing Ltd | 768 | 65.5K | 3 |
| AS203035GB | xc360 Xara Computers (UK) Ltd | 768 | — | 3 |
| AS202154GB | brevanhoward Brevan Howard Asset Management LLP | 768 | — | 3 |
| AS210511GB | blue-telecoms Direct Market Solutions Limited | 768 | — | 3 |
| AS206483GB | REDMATTER Red Matter Limited | 768 | — | 3 |
| AS205944GB | ISAM1 ISAM FUNDS (UK) LIMITED | 768 | — | 3 |
| AS206479GB | AceRDP AceRDP Ltd | 768 | — | 3 |
| AS205756GB | JLR JAGUAR LAND ROVER AUTOMOTIVE PLC | 768 | — | 3 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS208330GB | ASBLX BLX Limited | 1K | — | 1 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 589.8K | 6 |
| AS205996GB | Interfiber Interfiber Ltd | 1K | 65.5K | 2 |
| AS208408GB | KARANYI Karanyi Ltd | 1K | 4 | 8 |
| AS200652GB | SIPHON Nuvias UC Limited | 1K | 524.3K | 2 |
| AS208402GB | cerner Cerner Limited | 1K | 128 | 2 |
| AS202114GB | Blue_Sky_Systems Blue Sky Systems Limited | 1K | 65.5K | 5 |
| AS134536GB | ATT-NBE-GB - ATT NBE Equinix London | 1K | — | 4 |