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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 |
| 512 |
| 8 |
| 10 |
| AS34930GB | HAL LHR AIRPORTS LIMITED | 512 | — | 2 |
| AS197407GB | CUCE CHINA UNICOM (EUROPE) OPERATIONS LIMITED | 512 | — | 2 |
| AS47571GB | DCMANAGED Digital Craftsmen Ltd. | 512 | — | 2 |
| AS197622GB | PARSELY-AS NEXTTRANSLATE LTD | 512 | — | 2 |
| AS57483GB | ICHILTON Ian Chilton | 512 | 14 | 16 |
| AS62299GB | BLUEMATRIX-AS Bluematrix Research LTD | 512 | — | 2 |
| AS209413GB | DEDIK-CH DEDIK SERVICES LIMITED | 512 | — | 2 |
| AS207158GB | WORLDCDN Clouvider Limited | 512 | — | 2 |
| AS210412GB | hampsteadfibre Hampstead Fibre Ltd | 512 | 524.3K | 3 |
| AS215981GB | X-Fibre X-Fibre Ltd | 512 | — | 2 |
| AS214314GB | CUSHWAKE-UK2 Cushman & Wakefield Debenham Tie Leung Limited | 512 | — | 2 |
| AS207701GB | DataGrid Talia Limited | 512 | 1 | 3 |
| AS199706GB | BLOCK-AS Block Solutions Ltd | 512 | — | 2 |
| AS211501GB | HIGHTIDEGROUP-AS High Tide Group Limited | 512 | 524.3K | 4 |
| AS215854GB | DC-3-PROJECT Exponential-E Ltd. | 512 | — | 2 |
| AS203795GB | uk-fidelis-1-as FIDELIS MARKETING LIMITED | 512 | — | 2 |
| AS58062GB | StarNetwork w1n ltd | 512 | 1 | 3 |
| AS208915GB | HyperLink HYPERLXC MEDICAL LTD | 512 | 65.5K | 6 |
| AS210809GB | UniFlex UniFlex Systems Limited | 512 | — | 2 |
| AS44480GB | Brevan-Howard-AS Brevan Howard Asset Management LLP | 512 | — | 2 |
| AS203128GB | NSML NEWCASTLE STRATEGIC SOLUTIONS LIMITED | 512 | — | 1 |
| AS51983GB | SARGASSO-DE-AS Sargasso N1 Limited | 512 | — | 1 |
| AS211077GB | HO-LECN-DC01 UK Home Office (The Secretary of State for the Home Department) | 512 | — | 2 |
| AS41596GB | WGSL-AS Willis Group Services Ltd | 512 | — | 2 |
| AS50078GB | X-ON X-ON HEALTH LIMITED | 512 | — | 2 |
| AS5586GB | MCI-INT Verizon UK Limited | 512 | 32 | 3 |
| AS216026GB | Smart-Technology-Advisers Smart Technology Advisers Ltd | 512 | — | 2 |
| AS213534GB | GardnersBooks Gardners Books Ltd | 512 | — | 2 |
| AS34934GB | UKFast ANS ACADEMY LIMITED | 512 | — | 2 |
| AS202297GB | SKYLON Skylon Solutions Limited | 512 | 65.6K | 8 |
| AS206870GB | bcg-as Brightcloud Ltd | 512 | — | 2 |
| AS60654GB | METD-AS Metdesk Ltd | 512 | — | 2 |
| AS43486GB | MSUI1-AS Mizuho Bank Ltd | 512 | — | 2 |
| AS62364GB | PLYMOUTH-CITY-COUNCIL Plymouth City Council | 512 | — | 2 |
| AS215320GB | AlncomAS2 ALNWICK COMPUTERWARE LTD. | 512 | 131.1K | 3 |
| AS205359GB | precisely-ltd Precisely Software Ltd | 512 | — | 2 |
| AS48682GB | IPSL IP Space Limited | 512 | — | 2 |
| AS208176GB | HYVE-MANAGED-HOSTING Hyve Ltd | 512 | 4 | 4 |
| AS50287GB | AudatexUK Audatex (UK) Ltd | 512 | 16 | 3 |
| AS212152GB | AS-Beazley Beazley Management Limited | 512 | — | 2 |
| AS50656GB | Optix-Software-ASN Optix Software Ltd | 512 | — | 2 |
| AS49372GB | Wichita-Inter-Konnects-1LL4H w1n ltd | 512 | — | 2 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS199285GB | CONARX Conarx, Ltd | 512 | 2 | 4 |
| AS202416GB | DATALORDS Kart Technologies Limited | 512 | 524.3K | 4 |
| AS213840GB | DDOS-PROTECTION-LTD DDOS PROTECTION LTD | 512 | — | 2 |