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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 | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,127 |
| 768 |
| 65.5K |
| 3 |
| AS206798GB | UK-Huawei HUAWEI TECHNOLOGIES(UK)CO.,LTD | 768 | — | 2 |
| AS202149GB | platformuk Comcast International Holdings UK Limited | 768 | — | 2 |
| AS204928GB | AS-BONSAIHOST Bonsai Hosting ltd | 768 | 65.5K | 4 |
| AS216311GB | NORYLIX-AS NORYLIX LTD | 768 | — | 3 |
| AS212406GB | TransFICC TransFICC Ltd. | 768 | — | 3 |
| AS206479GB | AceRDP AceRDP Ltd | 768 | — | 3 |
| AS43178GB | TECHNOLABS Technolabs Networks Ltd. | 768 | — | 2 |
| AS207543GB | DUG-APIC-AUS DOWNUNDER GEOSOLUTIONS (LONDON) PTY LIMITED | 768 | — | 3 |
| AS202901GB | NETCALL Netcall Technology Limited | 768 | — | 3 |
| AS44548GB | CMCMarkets-AS CMC MARKETS PLC | 768 | — | 3 |
| AS48804GB | GLOBALSIGN GMO GlobalSign Ltd | 768 | 196.6K | 6 |
| AS207009GB | UK-FUTURE Future Publishing Ltd | 768 | 65.5K | 3 |
| AS40992GB | MAREX Marex Financial Ltd | 768 | — | 2 |
| AS210627GB | GrayshottGigabit Grayshott Gigabit Limited | 768 | 524.3K | 3 |
| AS210054GB | TNCG NCG Energy Ltd | 768 | 1M | 7 |
| AS204242GB | TRUTECS-AS Trutec Services | 768 | — | 3 |
| AS204193GB | Pragma Gamma Telecom Holdings Ltd | 768 | — | 3 |
| AS212807GB | RockIT-Net RockIT Networks Limited | 768 | 524.3K | 4 |
| AS212169GB | TECH-RMMINET CARDOCK HOSTING LIMITED | 768 | — | 3 |
| AS59952GB | ExpediaEU Expedia.com Ltd. | 768 | — | 3 |
| AS204767GB | PRIVATE-DATACENTER VIRTUAL PRIVATE SERVER DATACENTER LIMITED | 768 | — | 3 |
| AS205944GB | ISAM1 ISAM FUNDS (UK) LIMITED | 768 | — | 3 |
| AS64415GB | CONNECTBIT-AS Ashgoal Limited | 768 | — | 3 |
| AS43428GB | YAHOO-ULS Yahoo-UK Limited | 768 | 1 | 4 |
| AS59907GB | IMSHealth IQVIA SOLUTIONS HQ LTD | 768 | — | 3 |
| AS39389GB | GTRL Gibson Thomas Rental Ltd | 768 | — | 2 |
| AS208756GB | deas-001 ALCON TELECOM LTD | 768 | — | 2 |
| AS210511GB | blue-telecoms Direct Market Solutions Limited | 768 | — | 3 |
| AS211678GB | MYFI-AS Michaelston y Fedw Internet CIC | 768 | 524.3K | 3 |
| AS209888GB | AERIANDI-AS Aeriandi Limited | 768 | — | 3 |
| AS203219GB | YAHOO-AMA Yahoo-UK Limited | 768 | 1 | 4 |
| AS202364GB | gridh Grid Hosting Limited | 768 | — | 3 |
| AS214351GB | FEMOIT FEMO IT SOLUTIONS LIMITED | 768 | — | 3 |
| AS200418GB | Uk-Dao Victor Connect Ltd. | 768 | — | 3 |
| AS214347GB | MDTS-LTD Massive Dynamic Technical Services Limited | 512 | 1 | 3 |
| AS41596GB | WGSL-AS Willis Group Services Ltd | 512 | — | 2 |
| AS213460GB | simplisticnodeus SIMPLE COMMUNICATIONS LIMITED | 512 | — | 2 |
| AS215854GB | DC-3-PROJECT Exponential-E Ltd. | 512 | — | 2 |
| AS208026GB | LITTLEWOODS LITTLEWOODS LTD | 512 | — | 2 |
| AS48682GB | IPSL IP Space Limited | 512 | — | 2 |
| AS215419GB | karizanta Karizanta LTD | 512 | 2 | 4 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS212656GB | UK-3VEREST 3verest Limited | 512 | — | 2 |
| AS39592GB | IGX0-AS Benjamin Ashton | 512 | — | 2 |
| AS207520GB | EXODUSPOINT-CAPITAL-MANAGEMENT-UK ExodusPoint Capital Management UK, LLP | 512 | — | 2 |
| AS213287GB | Pure-IP-Europe-BV Pure IP Limited | 512 | — | 1 |