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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
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 |
| 8.4K |
| 65.5K |
| 3 |
| AS28792GB | PUBLIC-INTERNET Public Internet Ltd | 8.4K | 65.5K | 13 |
| AS52148GB | ENIXLTD Enix Ltd | 8.4K | 524.3K | 13 |
| AS202020GB | FLEXGRID Flexgrid Ltd | 8.4K | — | 9 |
| AS29636GB | CATALYST2-AS Team Blue Carrier Limited | 8.4K | 65.5K | 3 |
| AS29197GB | LEHMAN-AS3 Nomura International Plc | 8.4K | — | 23 |
| AS21077GB | ISP4BAS Specialist Computer Centres Plc | 8.4K | — | 12 |
| AS201002GB | PebbleHost-Customers PebbleHost Ltd | 8.4K | 65.8K | 37 |
| AS41936GB | COLT-GROUP Colt International Ltd | 8.2K | — | 1 |
| AS44684GB | MYTHIC Mythic Beasts Ltd | 8.2K | 65.5K | 9 |
| AS9161GB | PSL Poundbury Systems Ltd. | 8.2K | — | 1 |
| AS29006GB | POBOX-AS Acora Limited | 8.2K | 4.1K | 3 |
| AS39627GB | BSKYB Sky UK Limited | 8.2K | — | 1 |
| AS29446GB | CHUNKYCHIPS-AS ChunkyChips.net Limited | 8.2K | — | 1 |
| AS62313GB | PROACT-AS Proact IT UK Limited | 8.2K | — | 21 |
| AS205892GB | NOMICAL Nomical Ltd | 8.2K | 524.3K | 14 |
| AS16174GB | INTUITIV-AS Intuitiv Ltd. | 8.2K | 65.5K | 4 |
| AS34270GB | INETC Internet Connections Ltd | 8.2K | 65.5K | 2 |
| AS35551GB | ASSIMISIS-AS TGL Services (UK) Ltd | 8.2K | 65.5K | 4 |
| AS42579GB | SARGASSO-EU-AS Comtec Enterprises Ltd | 8.2K | 98.3K | 8 |
| AS20695GB | C1UK-AS Capital One (Europe) Plc | 8.2K | — | 17 |
| AS24742GB | APAKGROUP-AS APAK Group Limited | 8.2K | — | 1 |
| AS15510GB | CWCS-PS Compuweb Communications Services Limited | 7.9K | 65.5K | 12 |
| AS62217GB | VooServers Vinters IT Ltd | 7.9K | 606.2K | 35 |
| AS16260GB | GTT-AUS GTT - EMEA Ltd. | 7.9K | 4 | 11 |
| AS60194GB | VTG-AS Anchor Computer Systems Ltd | 7.9K | — | 22 |
| AS21472GB | SERVERHOUSE ServerHouse Ltd | 7.9K | 65.5K | 12 |
| AS199775GB | Connexin-Limited Connexin Limited | 7.7K | — | 12 |
| AS212027GB | PebbleHost PebbleHost Ltd | 7.7K | 256 | 25 |
| AS41489GB | WF-AS Watchfront Limited | 7.7K | 65.5K | 6 |
| AS210892GB | LIGHTSPEED-UK-AS Lightspeed Networks Ltd | 7.7K | 1.5K | 28 |
| AS43519GB | NOMINETANYCAST Nominet UK | 7.7K | 35 | 65 |
| AS25460GB | TNP-AS The Networking People (TNP) Limited | 7.4K | 65.5K | 10 |
| AS2589GB | WANSTOR Wanstor Ltd | 7.4K | 65.5K | 13 |
| AS35071GB | UK-XOOM-SYSTEMS-AS Xoom Limited | 7.4K | — | 10 |
| AS213702GB | QWINS-LTD QWINS LTD | 7.4K | 96 | 35 |
| AS44369GB | EMBC-EMPSN-AS emPSN Services Limited | 7.4K | — | 5 |
| AS215355GB | AliceNetwork ALICE NETWORKS LTD | 7.4K | 293 | 44 |
| AS207158GB | WORLDCDN Clouvider Limited | 7.4K | — | 29 |
| AS205220GB | RHC-Hosting RH & Co. IT Services Ltd | 7.4K | — | 28 |
| AS197898GB | IDSI Integrated Digital Services Ltd | 7.2K | 131.1K | 7 |
| AS204558GB | ODYSSEY Odyssey Systems Ltd | 7.2K | 65.5K | 5 |
| AS204167GB | hyve Hyve Ltd | 7.2K | 7 | 19 |
| AS56396GB | Amobee NEXXEN GROUP LTD | 6.9K | 1 | 7 |
| AS201971GB | CreeperHostLTD-AS CreeperHost LTD | 6.9K | 193 | 27 |
| AS213840GB | DDOS-PROTECTION-LTD DDOS PROTECTION LTD | 6.9K | — | 24 |
| AS25562GB | SCEE Sony Interactive Entertainment Europe Limited | 6.9K | — | 24 |