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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.
3,132 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
| 512 |
| — |
| 2 |
| AS219369GB | C2T ConstructInTech Limited | 512 | 2 | 4 |
| AS62299GB | BLUEMATRIX-AS Bluematrix Research LTD | 512 | — | 2 |
| AS210282GB | FRONTIERDC-AS Frontier Technology Limited | 512 | — | 2 |
| AS199706GB | BLOCK-AS Block Solutions Ltd | 512 | — | 2 |
| AS200682GB | TLC-ASN Trustees of the London Clinic Limited | 512 | — | 2 |
| AS207673GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS214557GB | hostmenow HOSTMENOW LTD | 512 | — | 2 |
| AS41538GB | INSPIRED-AS Inspired Gaming (UK) Limited | 512 | — | 2 |
| AS43259GB | LEIDOS-UK Leidos Innovations UK LTD | 512 | — | 2 |
| AS48761GB | MAXINAMES Maxinames Ltd | 512 | — | 2 |
| AS48967GB | BATS_TRADING Cboe Europe Limited | 512 | — | 2 |
| AS211077GB | HO-LECN-DC01 UK Home Office (The Secretary of State for the Home Department) | 512 | — | 2 |
| AS214347GB | MDTS-LTD Massive Dynamic Technical Services Limited | 512 | 1 | 3 |
| AS34930GB | HAL LHR AIRPORTS LIMITED | 512 | — | 2 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS59410GB | BARRITEC Barritel Ltd | 512 | 65.5K | 3 |
| AS200008GB | PIRUM-AS Pirum Systems Limited | 512 | 524.3K | 3 |
| AS215981GB | X-Fibre X-Fibre Ltd | 512 | — | 2 |
| AS214453GB | jandutech Beon Core Ltd | 512 | — | 2 |
| AS212152GB | AS-Beazley Beazley Management Limited | 512 | — | 2 |
| AS213482GB | WATERFALL Waterfall Technologies Ltd | 512 | 69.8K | 13 |
| AS202067GB | advantex Advantex Network Solutions Ltd | 512 | — | 2 |
| AS213840GB | DDOS-PROTECTION-LTD DDOS PROTECTION LTD | 512 | — | 2 |
| AS208638GB | mimecast-it-corp Mimecast Services Limited | 512 | — | 2 |
| AS214199GB | luxxysystems Johnathan Hine | 512 | 2 | 4 |
| AS30909GB | FASTVISION Fastvision Limited | 512 | — | 2 |
| AS210412GB | hampsteadfibre Hampstead Fibre Ltd | 512 | 524.3K | 3 |
| AS210203GB | RETN-IT-AS RETN Limited | 512 | — | 1 |
| AS48397GB | Unipart-AS Unipart Group Limited | 512 | — | 2 |
| AS59803GB | cceip DATAQUEST (HEATHROW) LIMITED | 512 | — | 1 |
| AS41570GB | SSVC-AS BFBS | 512 | — | 2 |
| AS50972GB | JamieOliver Jamie Oliver Ltd. | 512 | — | 1 |
| AS8619GB | closebrothers-as Close Brothers Limited | 512 | — | 2 |
| AS208755GB | NETWORKABLE Thomas Ferguson | 512 | 17 | 4 |
| AS39592GB | IGX0-AS Benjamin Ashton | 512 | — | 2 |
| AS50419GB | EXASTACK Eye Pea Ltd. | 512 | 1 | 3 |
| AS212660GB | WHG-DXB1 WHG Hosting Services Ltd | 512 | — | 2 |
| AS59619GB | Blackpool-AS Blackpool Borough Council | 512 | — | 2 |
| AS201478GB | REDI_TECH Refinitiv Limited | 512 | — | 2 |
| AS203128GB | NSML NEWCASTLE STRATEGIC SOLUTIONS LIMITED | 512 | — | 1 |
| AS49313GB | SEVAHOST-AS Seva-Host Ltd | 512 | — | 2 |
| AS218774GB | UC-AS uno Ltd. | 512 | — | 1 |
| AS47581GB | NSFOCUS NSFOCUS Technologies UK Limited | 512 | — | 2 |
| AS43486GB | MSUI1-AS Mizuho Bank Ltd | 512 | — | 2 |
| AS215742GB | Duplia Duplia Ltd | 512 | 65.5K | 3 |
| AS211020GB | asrokatansky LOBOS NETWORKING LTD | 512 | — | 2 |