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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 |
| 65.5K |
| 10 |
| AS15418GB | IONOS-ANYCAST Fasthosts Internet Limited | 1K | 2 | 2 |
| AS205389GB | ZOOM-INTERNET Zoom Internet Ltd | 1K | 65.5K | 2 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS47492GB | CONSIDERIT Consider IT Limited | 1K | — | 4 |
| AS213867GB | TENERITY-AS TENERITY LIMITED | 1K | — | 4 |
| AS20596GB | future Future Publishing Ltd | 1K | 458.8K | 4 |
| AS205918GB | vertivco-emea VERTIV COMPANY GROUP LIMITED | 1K | — | 1 |
| AS61281GB | NDT-AS Chess Limited | 1K | — | 1 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS204414GB | OXAM The OxFORD Asset Management Company Limited | 1K | — | 1 |
| AS207511GB | LONDSTOCK-APAC London Stock Exchange PLC | 1K | — | 3 |
| AS43442GB | PROVU ProVu Communications Ltd | 1K | 1 | 2 |
| AS204116GB | HOSTRELAY-AS HOSTRELAY GLOBAL LTD | 1K | — | 4 |
| AS25030GB | NFU-AS National Farmers Union Mutual Insurance Society Ltd | 1K | — | 3 |
| AS50826GB | Moelis-and-Company-UK-LLP Moelis & Company UK LLP | 1K | — | 1 |
| AS204236GB | uk-div011 Daniel Ionita | 1K | — | 1 |
| AS211167GB | ITFARM IT Farm Limited | 1K | — | 4 |
| AS205599GB | abfoods A.B.F.HOLDINGS LIMITED | 1K | — | 1 |
| AS201867GB | OXAGON-AS OXAGON LIMITED | 1K | — | 4 |
| AS44824GB | CALLAGENIX-COLO-LONDON COMMI HOLDINGS LIMITED | 1K | — | 1 |
| AS60282GB | COVCITYCOUNCIL Coventry City Council | 1K | — | 1 |
| AS50882GB | MAXNETT Maxnett Ltd. | 1K | — | 1 |
| AS214351GB | FEMOIT FEMO IT SOLUTIONS LIMITED | 1K | — | 4 |
| AS205739GB | Allness-NET Allness IT Ltd | 1K | 524.3K | 5 |
| AS59439GB | VOICEFACTORY-AS EvolveIP LTD | 1K | 0 | 2 |
| AS44009GB | SLEEK-ASN Rackspace Ltd. | 1K | 65.5K | 2 |
| AS198306GB | AESL1 AIG Europe (Services) Limited | 1K | — | 3 |
| AS209274GB | Kraken-Network-ISP Kraken Network ISP LTD | 1K | — | 4 |
| AS59402GB | Virocom Virocom Limited | 1K | 524.3K | 2 |
| AS41281GB | KEFF KeFF Networks Ltd | 1K | 2 | 6 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS206246GB | Formosa FORMOSA CAPITAL LP | 1K | 131.1K | 6 |
| AS206324GB | STELLIUM-DC Stellium Networks Limited | 1K | 524.3K | 2 |
| AS208330GB | ASBLX BLX Limited | 1K | — | 1 |
| AS198723GB | UNI-READING University of Reading | 1K | 1 | 4 |
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS199788GB | MPS Motion Picture Solutions Limited | 1K | — | 1 |
| AS39414GB | BYTEFETCH ByteFetch Ltd | 1K | — | 1 |
| AS212413GB | DWP Department for Work and Pensions | 1K | — | 3 |
| AS197594GB | REDSTOR-AS Redstor Limited | 1K | — | 4 |
| AS209113GB | PRECEDENCE Precedence Technologies Ltd | 1K | — | 3 |
| AS16197GB | Innovanti Innovanti Limited | 1.3K | — | 5 |
| AS206223GB | Teledyne-UK Teledyne Limited | 1.3K | — | 2 |
| AS50510GB | CRUK-AS Cancer Research UK | 1.3K | — | 5 |
| AS209553GB | NETVAZ NETVAZ LIMITED | 1.3K | 4 | 9 |
| AS15622GB | uk-frontline Frontline Consultancy and Business Services Limited | 1.3K | — | 4 |