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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 |
| 8.2K |
| — |
| 1 |
| AS35551GB | ASSIMISIS-AS TGL Services (UK) Ltd | 8.2K | 65.5K | 4 |
| AS9161GB | PSL Poundbury Systems Ltd. | 8.2K | — | 1 |
| AS215355GB | AliceNetwork ALICE NETWORKS LTD | 8.2K | 293 | 46 |
| AS20695GB | C1UK-AS Capital One (Europe) Plc | 8.2K | — | 17 |
| AS42579GB | SARGASSO-EU-AS Comtec Enterprises Ltd | 8.2K | 98.3K | 8 |
| AS34270GB | INETC Internet Connections Ltd | 8.2K | 65.5K | 2 |
| AS39627GB | BSKYB Sky UK Limited | 8.2K | — | 1 |
| AS41936GB | COLT-GROUP Colt International Ltd | 8.2K | — | 1 |
| AS205434GB | Elasticity BE SLOUGH DC UK LIMITED | 8.4K | — | 13 |
| AS202020GB | FLEXGRID Flexgrid Ltd | 8.4K | — | 9 |
| AS52148GB | ENIXLTD Enix Ltd | 8.4K | 524.3K | 13 |
| AS28792GB | PUBLIC-INTERNET Public Internet Ltd | 8.4K | 65.5K | 13 |
| AS29636GB | CATALYST2-AS Team Blue Carrier Limited | 8.4K | 65.5K | 3 |
| AS8838GB | STRIPE-21-GROUP-LIMITED Compuweb Communications Services Limited | 8.4K | 65.5K | 3 |
| AS29197GB | LEHMAN-AS3 Nomura International Plc | 8.4K | — | 23 |
| AS21077GB | ISP4BAS Specialist Computer Centres Plc | 8.4K | — | 12 |
| AS213702GB | QWINS-LTD QWINS LTD | 8.4K | 96 | 39 |
| AS29676GB | GRADWELL Gradwell Communications Limited | 8.7K | — | 14 |
| AS41000GB | Freethought-AS Freethought Internet Limited | 8.7K | 1M | 12 |
| AS8676GB | PRTSYSTEMS PRT Systems Limited | 8.7K | 393.2K | 10 |
| AS35266GB | EXN-AS EX Networks Limited | 8.7K | 589.8K | 19 |
| AS205394GB | CSLDUAL-AS CSL (DualCom) Limited | 9K | 852K | 23 |
| AS30803GB | TRIDENT-NET Trident Net Limited | 9K | — | 3 |
| AS16212GB | LORAL-SKYNET-ASN Telesat International Ltd | 9K | — | 15 |
| AS60064GB | HOSTPALACE HOSTPALACE DATACENTERS LTD | 9.2K | 590.8K | 35 |
| AS29646GB | FFastFill-AS FFastFill Europe Limited | 9.2K | — | 5 |
| AS61373GB | CTW Connect The World Ltd. | 9.2K | — | 21 |
| AS57002GB | WHORGLTD William Hill Organization Ltd | 9.2K | — | 22 |
| AS41357GB | UK-34SP-AS 34SP.com Limited | 9.2K | 65.5K | 5 |
| AS21439GB | MORGAN-STANLEY Morgan Stanley & Co. International PLC | 9.5K | — | 6 |
| AS12678GB | BADOO-U Badoo Trading Limited | 9.5K | 512 | 22 |
| AS8683GB | NOMINET Nominet UK | 9.5K | 34.6K | 19 |
| AS47890GB | UNMANAGED-DEDICATED-SERVERS UNMANAGED LTD | 9.5K | 4 | 41 |
| AS199909GB | ELITETELE ELITETELE.COM PLC | 9.7K | — | 8 |
| AS48954GB | ArrowNET AIMES Management Services Ltd | 9.7K | — | 24 |
| AS47480GB | BlueTigerSolutions-AS Blue Tiger Solutions Limited | 9.7K | — | 9 |
| AS39767GB | SARGASSO-AS Sargasso N1 Limited | 9.7K | 524.3K | 6 |
| AS198550GB | nodehost-as NODE HOST LIMITED | 9.7K | — | 37 |
| AS34914GB | SYNTEC-AS Syntec LTD | 9.7K | — | 5 |
| AS8801GB | ROCKETFIBRE Rocket Fibre Ltd | 9.7K | 589.8K | 9 |
| AS207163GB | SKYCD-ES-AS Sky UK Limited | 9.7K | 524.3K | 5 |
| AS202038GB | INTERCITY-TECH-UKCORE Intercity Technology Ltd | 9.7K | — | 15 |
| AS58325GB | BANDWIDTH-ASIA Hydra Communications Ltd | 10K | 16 | 15 |
| AS43009GB | INFOBIP-AS Infobip Limited | 10K | 2 | 41 |
| AS208687GB | Jurassic-Fibre AllPoints Fibre Networks Limited | 10K | 524.3K | 5 |
| AS21260GB | POSITIVE-INTERNET-UK-AS The Positive Internet Company Ltd | 10K | — | 18 |