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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 | 4,120 |
| 1.3K |
| — |
| 5 |
| AS203938GB | SAMUEL-COSGROVE Samuel Cosgrove | 1.3K | — | 5 |
| AS208697GB | KMSL-AS Kellogg Management Services (Europe) Limited | 1.3K | — | 5 |
| AS31050GB | FRAMESTORE The Framestore Limited | 1.3K | — | 5 |
| AS215304GB | SOLREN SOLREN LIMITED | 1.3K | — | 5 |
| AS206069GB | CORNSEED Cornseed Limited | 1.3K | 2 | 6 |
| AS41103GB | CLEARIP-AS teleBIZZ Ltd | 1.3K | 65.5K | 4 |
| AS208636GB | SDC SDC Hosting and Support Ltd | 1.3K | — | 5 |
| AS199456GB | VLDTECH-ASN VALID TECHNOLOGY L.P. | 1.3K | 32.8K | 7 |
| AS25588GB | SIXDEGREES-CLOUD-AS Six Degrees Technology Group Limited | 1.3K | — | 4 |
| AS209274GB | Kraken-Network-ISP Kraken Network ISP LTD | 1.3K | — | 5 |
| AS202052GB | CTS-GROUP CTS Group Ltd | 1.3K | — | 2 |
| AS56540GB | CONSENSUSONE-AS BITNIFTY LTD | 1.3K | — | 4 |
| AS3232GB | ORG-ML847-RIPE ModernColo LP | 1.3K | — | 5 |
| AS198362GB | nethuk2 NETH LTD | 1.3K | — | 5 |
| AS207310GB | cinos Cinos Communications Services Limited | 1.3K | — | 5 |
| AS51031GB | StarNetwork w1n ltd | 1.3K | 258 | 7 |
| AS25048GB | DSNet DSNET Ltd | 1.3K | 196.6K | 10 |
| AS215759GB | Ziax Ziax Ltd | 1.3K | 2 | 7 |
| AS47823GB | NHL-AS2 Netwise Hosting Ltd | 1.3K | — | 2 |
| AS28959GB | VITOL-AS Vitol Services Ltd | 1.3K | — | 5 |
| AS211844GB | SWATER-ASN Southern Water Services Ltd | 1.3K | — | 5 |
| AS196674GB | SPEEDFLOW-AS Speedflow Communications Ltd | 1.3K | 1 | 6 |
| AS24705GB | ECOM-SPARE Single Mode Networks Ltd | 1.3K | — | 2 |
| AS199828GB | Inet-Plc-AS NUSO CLOUD UK LIMITED | 1.3K | — | 2 |
| AS205545GB | E-WIRE JIWA Holdings Ltd | 1.3K | — | 2 |
| AS209318GB | NEBIC North East Business and Innovation Centre Limited | 1.3K | 589.8K | 4 |
| AS15622GB | uk-frontline Frontline Consultancy and Business Services Limited | 1.3K | — | 4 |
| AS58349GB | INNETRA-AS Elna Paulette Valentin trading as INNETRA PC | 1.3K | — | 4 |
| AS39584GB | LGIM Legal & General Investment Management Holdings Ltd | 1.3K | — | 5 |
| AS48901GB | DSNET-CSP DSNET Ltd | 1.3K | 65.5K | 5 |
| AS204670GB | NTT NTT United Kingdom Ltd | 1.3K | — | 5 |
| AS9179GB | OFFICENET OfficeNet Systems Limited | 1.3K | — | 2 |
| AS39602GB | TCG-AS The Cent.re Group Limited | 1.3K | 524.3K | 5 |
| AS215128GB | iONLINE-ISP-UK IONLINE INTERNET SOLUTIONS PROVIDER LTD | 1.3K | 524.3K | 5 |
| AS50807GB | INSPIRETEC-ASN Inspiretec LTD | 1.3K | — | 4 |
| AS215925GB | VPSVAULTHOST VPSVAULT.HOST LTD | 1.3K | — | 5 |
| AS216167GB | Gamma-GCE Gamma Telecom Holdings Ltd | 1.3K | — | 5 |
| AS48444GB | INTER-NET-UK Internet Ltd | 1.3K | — | 5 |
| AS49657GB | TNSI Transaction Network Services (UK) LTD | 1.3K | — | 4 |
| AS198426GB | Voneus Voneus Ltd | 1.3K | — | 2 |
| AS216180GB | WHG-AUS WHG Hosting Services Ltd | 1.3K | — | 5 |
| AS204978GB | dmalagon LOBOS NETWORKING LTD | 1.3K | — | 2 |
| AS206223GB | Teledyne-UK Teledyne Limited | 1.3K | — | 2 |
| AS49415GB | VTSL-AS VTSL Ltd | 1.3K | — | 5 |
| AS213513GB | COMPUTLE Computle Limited | 1.3K | 524.3K | 6 |
| AS203851GB | as_csd001 CSD Network Services Ltd | 1.3K | — | 5 |