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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 |
| 2K |
| — |
| 1 |
| AS44442GB | TelfordWrekinCouncilAS The Borough of Telford and Wrekin Council | 2K | — | 1 |
| AS199954GB | Techwareca Techwareca Ltd. | 2K | 524.3K | 2 |
| AS34134GB | FREECLIX FreeClix Ltd | 2K | 524.3K | 5 |
| AS208522GB | uk-optimus Optimus Networks LTD | 2K | — | 3 |
| AS198850GB | HOGARTH-WORLDWIDE WPP PRODUCTION LIMITED | 2K | — | 1 |
| AS205693GB | dvla Driver & Vehicle Licensing Agency | 2K | — | 4 |
| AS203987GB | VYSIION-AS Vysiion Limited | 2K | — | 2 |
| AS215262GB | CLOUDNORD-UKNODE-AS Cloud Nord Limited | 2K | 18 | 9 |
| AS35259GB | APM APM Internet Ltd | 2K | — | 1 |
| AS34737GB | QinetiQ-ISP Qinetiq Limited | 2K | — | 4 |
| AS34746GB | AXA_INSURANCE AXA Insurance UK plc | 2K | — | 1 |
| AS47113GB | SLP Suffolk Life Pensions Limited | 2K | — | 1 |
| AS43534GB | CREDITCALL Network Merchants Limited | 2K | — | 5 |
| AS42775GB | DSRT-NET ADWORLDS TECHNOLOGIES LP | 2K | 1 | 4 |
| AS28729GB | FORD-AS Ford Motor Company Limited | 2K | 1 | 2 |
| AS49418GB | AS-NETSHIELD NETSHIELD LTD | 2K | 68 | 13 |
| AS206547GB | CDK-Global-EU Keyloop Holdings (UK) Limited | 2K | — | 4 |
| AS41400GB | GNOL-AS R.M. Wotton T/A G-Net Online | 2K | 524.3K | 3 |
| AS8444GB | HENDERSON JANUS HENDERSON ADMINISTRATION UK LIMITED | 2K | — | 8 |
| AS50948GB | amdocs-uk-dc-as AMDOCS (UK) LIMITED | 2K | — | 6 |
| AS27263GB | NUHL - NATURA &Co UK HOLDINGS LIMITED | 2K | — | 2 |
| AS215468GB | LOCKBOX LOCKBOX NETWORKS LLP | 2K | — | 8 |
| AS50422GB | RBS-GBM Natwest Markets PLC | 2K | — | 6 |
| AS209738GB | IONFIBRE CURVE INFORMATION TECHNOLOGY LIMITED | 2K | — | 8 |
| AS204436GB | KUALO-AS Kualo Limited | 2K | 65.5K | 3 |
| AS209761GB | NECS North of England Commissioning Support Unit | 2K | — | 3 |
| AS206411GB | FASTWARP-LLP Fastwarp LLP | 2K | — | 8 |
| AS205373GB | rightmove Rightmove Group Limited | 2K | — | 5 |
| AS207096GB | aslinkweb Link Web Solutions LLP | 2K | 524.3K | 5 |
| AS197370GB | NOTTSCC Nottinghamshire County Council | 2K | — | 1 |
| AS47704GB | ACADEMIA-AS Academia Ltd | 2K | 524.3K | 4 |
| AS218829GB | DIGITALITCREATIONS-MNT Digital IT Creations Ltd | 2.3K | — | 9 |
| AS219250GB | CIVO-LON2 Civo LTD | 2.3K | — | 2 |
| AS33970GB | M247 M247 Ltd | 2.3K | — | 6 |
| AS31151GB | PHG-AS PERFORMANCE HORIZON GROUP LIMITED | 2.3K | — | 9 |
| AS44891GB | AS24SEVEN-AS 24 Seven Communications Ltd | 2.3K | 65.5K | 10 |
| AS201714GB | LinkIPNetworks Link IP Networks Ltd | 2.3K | — | 6 |
| AS50152GB | IMED Intermedia Technologies Company Limited | 2.3K | — | 4 |
| AS60793GB | OCEAN-AS TELEFONICA TECH NORTHERN IRELAND LIMITED | 2.3K | 65.5K | 4 |
| AS212175GB | STELIA Stelia Ltd | 2.3K | 524.3K | 15 |
| AS8330GB | LONAP LONAP Ltd | 2.3K | 65.5K | 3 |
| AS203235GB | ZANANET zananet Limited | 2.3K | 524.3K | 4 |
| AS213495GB | SERVITRO-LTD SERVITRO LTD | 2.3K | 1 | 10 |
| AS35327GB | NAGLOTECH Naglotech Limited | 2.3K | 1 | 6 |
| AS212047GB | CIVO-USA Civo LTD | 2.3K | 65.5K | 3 |
| AS199286GB | ANS-AS Abtec Network Systems LTD | 2.3K | — | 3 |