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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
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| 0 |
| AS50162GB | AS50162-AS 3nt solutions LLP | — | — | 0 |
| AS57155GB | COAST805-AS Contingency Networks Ltd | — | — | 0 |
| AS59736GB | JETSTREAM JetStream England Limited | — | — | 0 |
| AS43006GB | DIGITAL-REALTY-IE Digital Realty (UK) Limited | — | — | 0 |
| AS29026GB | CTAYLOR-AS CHARLES TAYLOR LIMITED | — | — | 0 |
| AS48663GB | PORTFAST-NORTH Portfast Ltd | — | — | 0 |
| AS56726GB | fouron 4on LTD | — | — | 0 |
| AS209600GB | LIVEFIXGROUP Livefix Technical Solutions Group Limited | — | 32 | 2 |
| AS201811GB | LAURINTAPP-AS LAURINTAPP LTD | — | — | 0 |
| AS62408GB | ProvistaUK Provista UK Ltd | — | — | 0 |
| AS61977GB | PATH-GLOBAL-UK-LIMITED Path Global UK Limited | — | — | 0 |
| AS57688GB | BT-PSN-AS British Telecommunications PLC | — | — | 0 |
| AS199853GB | HOSTIQOR-AS Hostiqor Limited | — | — | 0 |
| AS206000GB | HRE Harry Rowan Elenor | — | 257 | 2 |
| AS132865GB | CMSL-AS-AP - Connect Managed Services (UK) Limited | — | — | 0 |
| AS50711GB | SYN-ANY SYN LTD | — | — | 0 |
| AS204340GB | IQVIA-Germany IQVIA LTD. | — | — | 0 |
| AS42761GB | BRINKS Brinks Global Services Ltd | — | — | 0 |
| AS41276GB | TRUSTMARQUE WorldPay (UK) Limited | — | — | 0 |
| AS31562GB | OPENMARKET OpenMarket Limited | — | — | 0 |
| AS49396GB | LLWYNYGORRAS Llwynygorras Cyf | — | — | 0 |
| AS200754GB | SHADOWRHYTHM-AS SHADOWRHYTHM LIMITED | — | 3 | 3 |
| AS208665GB | TELEKLINE-AS Gareth Pulham | — | — | 0 |
| AS202937GB | uk-scripps Discovery Corporate Services Limited | — | — | 0 |
| AS199210GB | EY-DE-NGDC-1 EY Global Services Limited | — | — | 0 |
| AS199766GB | JNET Julita Oskroba | — | — | 0 |
| AS212992GB | blueprint_as Blueprint Gaming Ltd. | — | — | 0 |
| AS215113GB | VIHLTD VICTORIA INTERNATIONAL HOLDINGS LTD | — | — | 0 |
| AS213265GB | RSRUK NEO NEXT + ENERGY RESOURCES UK LIMITED | — | — | 0 |
| AS56758GB | CR0BAR Cr0bar Limited | — | 6 | 6 |
| AS211131GB | as_globaltechinterapps LOBOS NETWORKING LTD | — | — | 0 |
| AS208147GB | Snuggle Evie Snuggle | — | — | 0 |
| AS209869GB | OLLIES_CLOUD Ollie's Cloud LTD | — | — | 0 |
| AS43838GB | Education-Bradford City of Bradford Metropolitan District | — | — | 0 |
| AS43433GB | MICROFROST Christopher Frost | — | — | 0 |
| AS29297GB | linkconnect-as Southern Communications Ltd | — | — | 0 |
| AS213843GB | KOARA-AS Koara International Limited | — | — | 0 |
| AS43336GB | ASPIXIE PIXIE NETWORKS LTD | — | 524.3K | 1 |
| AS8689GB | POWERNETUK Digital Space Group Limited | — | — | 0 |
| AS16755GB | The-London-Metal-Exchange The London Metal Exchange | — | — | 0 |
| AS6675GB | COLT-FRANCE-AS COLT Technology Services Group Limited | — | — | 0 |
| AS35269GB | vx-london VELOCIX SOLUTIONS LIMITED | — | — | 0 |
| AS34827GB | EBOR Ebor Limited | — | — | 0 |
| AS16204GB | AS44574 Network Services Ltd. | — | — | 0 |
| AS213289GB | iqvia Redcentric Solutions Ltd | — | — | 0 |
| AS204345GB | STALLARD Timothy Stallard | — | 1 | 1 |