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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 | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 976.9K | 4,012 |
| 6.1K |
| 524.3K |
| 24 |
| AS28780GB | PCMS-AS Flooid limited | 6.1K | — | 2 |
| AS35399GB | ITIO-AS Online50 Limited | 6.1K | 65.5K | 12 |
| AS42344GB | CC-AS Subtopia Ltd | 6.1K | 589.8K | 5 |
| AS50889GB | GFN-EMEA NVIDIA Ltd | 6.1K | — | 24 |
| AS9086GB | ASN-DOCKLANDS-DATA-CENTRE-LTD Docklands Data Centre Ltd | 6.1K | — | 9 |
| AS25582GB | ASN-LINIX NWIP Ltd | 6.1K | 524.3K | 9 |
| AS21470GB | SWISP-AS South West Communications Group Ltd | 6.1K | — | 2 |
| AS61097GB | Cloudsoftcat Softcat PLC | 6.1K | 65.5K | 9 |
| AS205771GB | OCTAPLUSUK OCTAPLUS NETWORKS LTD | 6.1K | 196.6K | 11 |
| AS59895GB | BINARYRACKS-AS Binary Racks Limited | 6.4K | 65.8K | 31 |
| AS34587GB | HLM2-AS Hillside (Technology) Ltd | 6.4K | — | 25 |
| AS51055GB | BRIDGEP-AS Bridge Fibre Limited | 6.4K | 131.1K | 9 |
| AS43872GB | OPTINET Optinet U.K. Limited | 6.4K | 3.7M | 23 |
| AS56474GB | CCDCUK Computacenter (UK) Ltd | 6.4K | — | 13 |
| AS207043GB | DEDIK-IO DEDIK SERVICES LIMITED | 6.4K | — | 25 |
| AS60800GB | NHL-AS1 Netwise Hosting Ltd | 6.7K | 524.3K | 9 |
| AS31220GB | CARRENZA-AS Six Degrees Technology Group Limited | 6.7K | — | 13 |
| AS8916GB | PORTFAST Portfast Ltd | 6.7K | 524.3K | 6 |
| AS29016GB | PEARSON-EMEA Pearson Shared Services Ltd | 6.7K | — | 10 |
| AS201971GB | CreeperHostLTD-AS CreeperHost LTD | 6.9K | 193 | 27 |
| AS56396GB | Amobee NEXXEN GROUP LTD | 6.9K | 1 | 7 |
| AS25562GB | SCEE Sony Interactive Entertainment Europe Limited | 6.9K | — | 24 |
| AS205548GB | Zouter ZOUTER LIMITED | 6.9K | 6 | 30 |
| AS29606GB | Borwood-AS Borwood Ltd | 6.9K | 65.5K | 10 |
| AS204558GB | ODYSSEY Odyssey Systems Ltd | 7.2K | 65.5K | 5 |
| AS204167GB | hyve Hyve Ltd | 7.2K | 7 | 19 |
| AS197898GB | IDSI Integrated Digital Services Ltd | 7.2K | 131.1K | 7 |
| AS25460GB | TNP-AS The Networking People (TNP) Limited | 7.4K | 65.5K | 10 |
| AS35071GB | UK-XOOM-SYSTEMS-AS Xoom Limited | 7.4K | — | 10 |
| AS44369GB | EMBC-EMPSN-AS emPSN Services Limited | 7.4K | — | 5 |
| AS2589GB | WANSTOR Wanstor Ltd | 7.7K | 65.5K | 14 |
| AS212027GB | PebbleHost PebbleHost Ltd | 7.7K | 256 | 25 |
| AS199775GB | Connexin-Limited Connexin Limited | 7.7K | — | 12 |
| AS43519GB | NOMINETANYCAST Nominet UK | 7.7K | 35 | 65 |
| AS41489GB | WF-AS Watchfront Limited | 7.7K | 65.5K | 6 |
| AS210892GB | LIGHTSPEED-UK-AS Lightspeed Networks Ltd | 7.7K | 1.5K | 28 |
| AS21472GB | SERVERHOUSE ServerHouse Ltd | 7.9K | 65.5K | 12 |
| AS62217GB | VooServers Vinters IT Ltd | 7.9K | 606.2K | 35 |
| AS60194GB | VTG-AS Anchor Computer Systems Ltd | 7.9K | — | 22 |
| AS16260GB | GTT-AUS GTT - EMEA Ltd. | 7.9K | 4 | 11 |
| AS15510GB | CWCS-PS Compuweb Communications Services Limited | 7.9K | 65.5K | 12 |
| AS213840GB | DDOS-PROTECTION-LTD DDOS PROTECTION LTD | 7.9K | — | 28 |
| AS203090GB | BitsFlowCloud BITSFLOWCLOUD LTD | 7.9K | 4 | 25 |
| AS205892GB | NOMICAL Nomical Ltd | 8.2K | 524.3K | 14 |
| AS42579GB | SARGASSO-EU-AS Comtec Enterprises Ltd | 8.2K | 98.3K | 8 |
| AS41936GB | COLT-GROUP Colt International Ltd | 8.2K | — | 1 |