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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 |
| 256 |
| 1 |
| 2 |
| AS206800GB | EA-SE-STOCKHOLM Electronic Arts Limited | 256 | — | 1 |
| AS56739GB | DICO PRT Systems Limited | 256 | — | 1 |
| AS198231GB | SIXNET Sixnet Operation Ltd | 256 | — | 1 |
| AS206457GB | EA-IE-GALWAY Electronic Arts Limited | 256 | — | 1 |
| AS51005GB | FOURDINTERACTIVE 4D Interactive Ltd | 256 | — | 1 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS218436GB | AVENTRAG AVENTRAG LTD | 256 | — | 1 |
| AS211371GB | TELET Telet Research (N.I) Limited | 256 | — | 1 |
| AS35241GB | vostel Vostel Limited | 256 | — | 1 |
| AS218644GB | DOGLE-AS Dylan Joseph Ogle | 256 | 1 | 2 |
| AS200708GB | PROTEUS-AS Hugo Rodrigues Da Costa | 256 | 1 | 2 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |
| AS215833GB | AblativeConsulting Ablative Consulting Ltd | 256 | 1 | 2 |
| AS57477GB | monsternet Monsternet Highland Ltd | 256 | — | 1 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |
| AS207155GB | STORMNET Stormnet Hosting LTD | 256 | 1 | 2 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS197320GB | NPA-AS National Pharmacy Association Ltd | 256 | — | 1 |
| AS57672GB | DJA-ASN Daniel James Austin | 256 | 1 | 2 |
| AS210192GB | TOPLINESYSTEMS Topline Systems Ltd | 256 | — | 1 |
| AS57377GB | LONDON-BOROUGH-OF-MERTON LONDON BOROUGH OF MERTON | 256 | — | 1 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS206822GB | CLOUDNET Clouvider Limited | 256 | — | 1 |
| AS203001GB | GateX GateX LIMITED | 256 | 1 | 2 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS3220GB | INTERNET-TECHNOLOGY-ADVISORS Internet Technology Advisors Scandinavia Ab | 256 | — | 1 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS48706GB | EDP KERRIDGE COMMERCIAL SYSTEMS (KSH) LIMITED | 256 | — | 1 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS208665GB | TELEKLINE-AS Gareth Pulham | 256 | 2 | 3 |
| AS212195GB | nexstor-as Nexstor Ltd | 256 | — | 1 |
| AS206392GB | HACKWORTH_UK Hackworth Ltd | 256 | 96 | 5 |
| AS206479GB | AceRDP AceRDP Ltd | 256 | — | 1 |
| AS48632GB | BTS-HOLDINGS-PLC BTS HOLDINGS PLC | 256 | — | 1 |
| AS47426GB | ADVITEL-AS Advitel Ltd | 256 | 1 | 2 |
| AS12628GB | SCREAMING-NET-AS JACO ENGELBRECHT | 256 | 1 | 2 |
| AS204776GB | Mintopia Jessica Smith | 256 | 257 | 3 |
| AS214064GB | Kevin-Titmarsh Kevin Titmarsh | 256 | 1 | 2 |
| AS200280GB | CameronSharp Cameron Sharp | 256 | 1 | 2 |
| AS200468GB | ALVAREZ ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP | 256 | — | 1 |
| AS219094GB | MCDADE William McDade | 256 | 2 | 3 |
| AS204519GB | KORPTRADE-AS SL029315 LP | 256 | — | 1 |