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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 |
| 1.3K |
| 65.5K |
| 5 |
| AS49415GB | VTSL-AS VTSL Ltd | 1.3K | — | 5 |
| AS21346GB | VISTORM-AS Enterprise Services Information Security UK Limited | 1.3K | — | 5 |
| AS219141GB | ROCKET-MARINICA ROCKET & MARINICA LTD | 1.3K | — | 5 |
| AS216167GB | Gamma-GCE Gamma Telecom Holdings Ltd | 1.3K | — | 5 |
| AS39621GB | STREAMUK-AS Stream UK Media Services Limited | 1.3K | — | 4 |
| AS44305GB | SIXDG-US-EQDC5 Six Degrees Technology Group Limited | 1.3K | — | 4 |
| AS31050GB | FRAMESTORE The Framestore Limited | 1.3K | — | 5 |
| AS58349GB | INNETRA-AS Elna Paulette Valentin trading as INNETRA PC | 1.3K | — | 4 |
| AS211058GB | threatspike-cloud-uk ThreatSpike Labs Limited | 1.3K | — | 5 |
| AS204670GB | NTT NTT United Kingdom Ltd | 1.3K | — | 5 |
| AS215128GB | iONLINE-ISP-UK IONLINE INTERNET SOLUTIONS PROVIDER LTD | 1.3K | 524.3K | 5 |
| AS209318GB | NEBIC North East Business and Innovation Centre Limited | 1.3K | 589.8K | 4 |
| AS213513GB | COMPUTLE Computle Limited | 1.3K | 524.3K | 6 |
| AS206232GB | AcuityUC Acuity Unified Communications Limited | 1.3K | — | 5 |
| AS205996GB | Interfiber Interfiber Ltd | 1.3K | 65.5K | 4 |
| AS42457GB | ascdck1 CARDOCK HOSTING LIMITED | 1.3K | — | 5 |
| AS43924GB | IQUO IQUO LIMITED | 1.3K | — | 4 |
| AS211126GB | WHG-MEX WHG Hosting Services Ltd | 1.3K | — | 5 |
| AS44314GB | ITSYNERGY ITsynergy Limited | 1.3K | 65.5K | 3 |
| AS199566GB | DATAPASA-AS DataPasa Limited | 1.3K | 1 | 6 |
| AS207765GB | Transit-Networks-Limited Transit Networks Limited | 1.3K | — | 5 |
| AS206223GB | Teledyne-UK Teledyne Limited | 1.3K | — | 2 |
| AS47549GB | HOSTINGSYSTEMS-AS Hosting Systems Ltd | 1.3K | — | 5 |
| AS204978GB | dmalagon LOBOS NETWORKING LTD | 1.3K | — | 2 |
| AS59717GB | ARCO-AS Arco Limited | 1.3K | 524.3K | 3 |
| AS24705GB | ECOM-SPARE Single Mode Networks Ltd | 1.3K | — | 2 |
| AS219113GB | Databridges-as Databridges Technologies Ltd. | 1.3K | — | 5 |
| AS202052GB | CTS-GROUP CTS Group Ltd | 1.3K | — | 2 |
| AS42909GB | COMMUNITYDNS Community DNS Limited | 1.3K | 3 | 8 |
| AS215759GB | Ziax Ziax Ltd | 1.3K | 2 | 7 |
| AS199828GB | Inet-Plc-AS NUSO CLOUD UK LIMITED | 1.3K | — | 2 |
| AS25588GB | SIXDEGREES-CLOUD-AS Six Degrees Technology Group Limited | 1.3K | — | 4 |
| AS39602GB | TCG-AS The Cent.re Group Limited | 1.3K | 524.3K | 5 |
| AS50510GB | CRUK-AS Cancer Research UK | 1.3K | — | 5 |
| AS15622GB | uk-frontline Frontline Consultancy and Business Services Limited | 1.3K | — | 4 |
| AS59820GB | Astro Astro Communications LTD | 1.3K | — | 2 |
| AS211844GB | SWATER-ASN Southern Water Services Ltd | 1.3K | — | 5 |
| AS213905GB | ISPLABS ISPLABS LIMITED | 1.3K | 22 | 12 |
| AS200418GB | Uk-Dao Victor Connect Ltd. | 1.3K | — | 4 |
| AS207310GB | cinos Cinos Communications Services Limited | 1.3K | — | 5 |
| AS62417GB | DIGITALK_CLOUD_THW DIGITALK Limited | 1.3K | — | 5 |
| AS208697GB | KMSL-AS Kellogg Management Services (Europe) Limited | 1.3K | — | 5 |
| AS203938GB | SAMUEL-COSGROVE Samuel Cosgrove | 1.3K | — | 5 |
| AS198895GB | ApexBroadband Techade Ltd | 1.3K | 524.3K | 6 |
| AS196674GB | SPEEDFLOW-AS Speedflow Communications Ltd | 1.3K | 1 | 6 |
| AS211912GB | WHG-USE2 WHG Hosting Services Ltd | 1.3K | — | 5 |