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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 |
| AS218865GB | WHITE-ISP-SOLUTIONS-LTD-AS WHITE ISP SOLUTIONS LTD | 1K | 4.4K | 3 |
| AS211298GB | DRIFTNET Driftnet Ltd | 1K | 327.7K | 9 |
| AS207511GB | LONDSTOCK-APAC London Stock Exchange PLC | 1K | — | 3 |
| AS34178GB | Qinetiq Qinetiq Limited | 1K | — | 4 |
| AS59402GB | Virocom Virocom Limited | 1K | 524.3K | 2 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 65.5K | 5 |
| AS210805GB | openinfra-isp-production-uk Open Infra ltd | 1K | 65.5K | 5 |
| AS59439GB | VOICEFACTORY-AS EvolveIP LTD | 1K | 0 | 2 |
| AS202114GB | Blue_Sky_Systems Blue Sky Systems Limited | 1K | 65.5K | 5 |
| AS198306GB | AESL1 AIG Europe (Services) Limited | 1K | — | 3 |
| AS62244GB | WBTSUK-AS Watch Tower Bible and Tract Society of Britain | 1K | 65.5K | 2 |
| AS197860GB | NET-HARUKA Haruka Network Limited | 1K | 38 | 12 |
| AS206690GB | BFC-FR2 Beeks Financial Cloud Ltd | 1K | — | 4 |
| AS201867GB | OXAGON-AS OXAGON LIMITED | 1K | — | 4 |
| AS60333GB | UOMCOMM The University of Manchester | 1K | — | 1 |
| AS209198GB | AS-ORECAT Offshore Renewable Energy Catapult | 1K | 65.5K | 2 |
| AS209329GB | CITYTALK-INTERNET FOCUS 4 U LTD | 1K | — | 1 |
| AS208765GB | Bulletproof Bullet Proof VPN Ltd | 1K | 524.3K | 5 |
| AS199788GB | MPS Motion Picture Solutions Limited | 1K | — | 1 |
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS30756GB | CENDANT-AS Travelport International Limited | 1K | — | 2 |
| AS204844GB | NCSE-NETWORK-Global NCSE NETWORK LTD | 1K | 4.4K | 18 |
| AS201903GB | EVORIO-AS Evorio Limited | 1K | — | 1 |
| AS39173GB | IFDS-AS SS&C FINANCIAL SERVICES INTERNATIONAL LIMITED | 1K | — | 2 |
| AS204247GB | ASDA-UK-AS Asda Stores Limited | 1K | — | 1 |
| AS6779GB | ICLNET-AS Fujitsu Services Ltd. | 1K | — | 2 |
| AS8669GB | TOTALWEBSOLUTIONS Total Web Solutions Ltd | 1K | — | 4 |
| AS214285GB | ABOVEBAR Above Bar Cyber Limited | 1K | 1 | 5 |
| AS60851GB | EMIS-AS Egton Medical Information Systems Limited | 1K | — | 2 |
| AS34344GB | THE-PORT-OF-TILBURY-LONDON-LTD Port Of Tilbury London Ltd | 1K | — | 3 |
| AS201664GB | netwarm NetWarm LTD | 1K | — | 4 |
| AS60825GB | CITRIXSYSTEMS-AS-UK CLOUD SG UK LTD | 1K | — | 4 |
| AS200147GB | ASHTL Hosting Techniques Limited | 1K | — | 1 |
| AS60011GB | MYTHIC-BEASTS-USA Mythic Beasts Ltd | 1K | 131.1K | 6 |
| AS200652GB | SIPHON Nuvias UC Limited | 1K | 524.3K | 2 |
| AS204598GB | AS-VILLAGENETWORKS Village Networks Ltd. | 1K | 524.3K | 4 |
| AS204440GB | farmuk STREAMLAND MEDIA UK LIMITED | 1K | — | 4 |
| AS211167GB | ITFARM IT Farm Limited | 1K | — | 4 |
| AS50173GB | VTESSE GTT - EMEA Ltd. | 1K | 2 | 6 |
| AS199462GB | NETISP-UK-AS NETISP LTD | 1K | 655.4K | 8 |
| AS58101GB | GLADSERV Gladserv Limited | 1K | 65.6K | 6 |
| AS206682GB | lima LIMA Networks Limited | 1K | — | 1 |
| AS35180GB | HIPCOM-AS Broadsoft LTD | 1K | 2 | 6 |
| AS209899GB | NUBIS zananet Limited | 1K | — | 1 |
| AS205106GB | PEASOUP Pea Soup Hosting Limited | 1K | — | 3 |