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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 |
| 1K |
| — |
| 3 |
| AS205918GB | vertivco-emea VERTIV COMPANY GROUP LIMITED | 1K | — | 1 |
| AS199569GB | Cognizant-EU-AS Cognizant Worldwide Limited | 1K | — | 2 |
| AS209113GB | PRECEDENCE Precedence Technologies Ltd | 1K | — | 3 |
| AS16362GB | The-London-Metal-Exchange The London Metal Exchange | 1K | — | 3 |
| AS20596GB | future Future Publishing Ltd | 1K | 458.8K | 4 |
| AS205106GB | PEASOUP Pea Soup Hosting Limited | 1K | — | 3 |
| AS205372GB | evrocomuk Evrocom.uk Limited trading as Fiber Zone | 1K | — | 1 |
| AS50203GB | UK-Reynolds-ASN Reynolds and Reynolds Limited | 1K | — | 3 |
| AS51318GB | STANDARD-CHARTERED-BANK-AS STANDARD CHARTERED BANK | 1K | — | 4 |
| AS6779GB | ICLNET-AS Fujitsu Services Ltd. | 1K | — | 2 |
| AS208895GB | intelligencehs Intelligence Hosting Services Limited | 1K | — | 1 |
| AS29754GB | AS29754 Qube Research and Technologies Limited | 1K | — | 4 |
| AS34344GB | THE-PORT-OF-TILBURY-LONDON-LTD Port Of Tilbury London Ltd | 1K | — | 3 |
| AS12884GB | DRW-Investments-AS DRW Investments (UK) Limited | 1K | — | 4 |
| AS203614GB | NEXTTRANSLATE-AS NEXTTRANSLATE LTD | 1K | — | 4 |
| AS43878GB | EUROPE-CONNECTED Clouvider Limited | 1K | — | 4 |
| AS207784GB | HYBIT-SERVICES HybrIT Services Ltd | 1K | — | 4 |
| AS199462GB | NETISP-UK-AS NETISP LTD | 1K | 655.4K | 8 |
| AS215925GB | VPSVAULTHOST VPSVAULT.HOST LTD | 1K | — | 4 |
| AS213183GB | WHG-LUX WHG Hosting Services Ltd | 1K | — | 3 |
| AS202792GB | CLOUD-TRANSIT Clouvider Limited | 1K | — | 4 |
| AS201664GB | netwarm NetWarm LTD | 1K | — | 4 |
| AS200052GB | FERAL Feral.io Ltd | 1K | — | 1 |
| AS51491GB | SYSGROUP-WALES SysGroup plc | 1K | — | 2 |
| AS210279GB | DMT DIGITAL MEDIA TECHNOLOGIES LTD | 1K | — | 1 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS208180GB | cts Bluecube Cyber Security Solutions Limited | 1K | — | 1 |
| AS208756GB | deas-001 ALCON TELECOM LTD | 1K | — | 3 |
| AS205197GB | kanta Kanta Enterprises Ltd | 1K | — | 1 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS200147GB | ASHTL Hosting Techniques Limited | 1K | — | 1 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS201261GB | Watershed The Watershed Arts Trust Ltd | 1K | — | 1 |
| AS209723GB | AS_Expert EXPERT NETCLOUD LLP | 1K | 524.3K | 3 |
| AS204116GB | HOSTRELAY-AS HOSTRELAY GLOBAL LTD | 1K | — | 4 |
| AS201277GB | Eloquent-AS Eloquent Technologies Ltd | 1K | 524.3K | 2 |
| AS204414GB | OXAM The OxFORD Asset Management Company Limited | 1K | — | 1 |
| AS205734GB | TRAPOC Copart UK Limited | 1K | — | 4 |
| AS62145GB | Bango BANGO.NET Ltd | 1K | — | 4 |
| AS205052GB | VISIONDATASOLUTIONS Vision Data Solutions LLP | 1K | 524.3K | 3 |
| AS50468GB | CITRUS-AS CITRUS TELECOMMUNICATIONS LTD | 1K | — | 4 |
| AS8577GB | xygnition XYGNITION RESEARCH LIMITED | 1K | — | 1 |
| AS214351GB | FEMOIT FEMO IT SOLUTIONS LIMITED | 1K | — | 4 |
| AS206405GB | CALIU CALIU LTD | 1K | — | 1 |
| AS204598GB | AS-VILLAGENETWORKS Village Networks Ltd. | 1K | 524.3K | 4 |
| AS60825GB | CITRIXSYSTEMS-AS-UK CLOUD SG UK LTD | 1K | — | 4 |