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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 | 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 |
| 1K |
| — |
| 2 |
| AS197234GB | stylez STYLEZ AI LTD | 1K | — | 4 |
| AS56670GB | WSCC-AS West Sussex County Council | 1K | — | 2 |
| AS204939GB | TAC-COMMUNICATIONS-UK TAC COMMUNICATIONS LTD | 1K | 524.3K | 2 |
| AS215925GB | VPSVAULTHOST VPSVAULT.HOST LTD | 1K | 16 | 5 |
| AS209899GB | NUBIS zananet Limited | 1K | — | 1 |
| AS214285GB | ABOVEBAR Above Bar Cyber Limited | 1K | 1 | 5 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 65.5K | 5 |
| AS6759GB | IOTX Pelion IoT Limited | 1K | — | 4 |
| AS198306GB | AESL1 AIG Europe (Services) Limited | 1K | — | 3 |
| AS50510GB | CRUK-AS Cancer Research UK | 1K | — | 4 |
| AS210096GB | Stemconnect Stem Connect LTD | 1K | — | 1 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS215672GB | MoeChuang-Network MoeChuang Network Limited | 1K | 16 | 5 |
| AS197282GB | WGMAST Wood Group UK Limited | 1K | — | 4 |
| AS204486GB | CHES-EAST Cheshire East Council | 1K | — | 1 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS208330GB | ASBLX BLX Limited | 1K | — | 1 |
| AS62145GB | Bango BANGO.NET Ltd | 1K | — | 4 |
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS208765GB | Bulletproof Bullet Proof VPN Ltd | 1K | 524.3K | 5 |
| AS50826GB | Moelis-and-Company-UK-LLP Moelis & Company UK LLP | 1K | — | 1 |
| AS201289GB | ESENDEX COMMIFY UK LIMITED | 1K | — | 1 |
| AS199788GB | MPS Motion Picture Solutions Limited | 1K | — | 1 |
| AS203171GB | CHITECHNOLOGY Chi Technology Ltd | 1K | — | 4 |
| AS39173GB | IFDS-AS SS&C FINANCIAL SERVICES INTERNATIONAL LIMITED | 1K | — | 2 |
| AS200652GB | SIPHON Nuvias UC Limited | 1K | 524.3K | 2 |
| AS201506GB | INCITO Incito Limited | 1K | 65.5K | 2 |
| AS50468GB | CITRUS-AS CITRUS TELECOMMUNICATIONS LTD | 1K | — | 4 |
| AS199946GB | Ctalk Ctalk Limited | 1K | — | 4 |
| AS207511GB | LONDSTOCK-APAC London Stock Exchange PLC | 1K | — | 3 |
| AS205734GB | TRAPOC Copart UK Limited | 1K | — | 4 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS207827GB | CSL-IOT CSL (DualCom) Limited | 1K | — | 3 |
| AS210087GB | ONTIX Ontix Sites No1 Limited | 1K | — | 1 |
| AS214116GB | AcoraAPC2-AS Acora Limited | 1K | — | 1 |
| AS41281GB | KEFF KeFF Networks Ltd | 1K | 2 | 6 |
| AS212413GB | DWP Department for Work and Pensions | 1K | — | 3 |
| AS59439GB | VOICEFACTORY-AS EvolveIP LTD | 1K | 0 | 2 |
| AS205052GB | VISIONDATASOLUTIONS Vision Data Solutions LLP | 1K | 524.3K | 3 |
| AS206984GB | lypy Lypy Limited | 1K | 524.3K | 3 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS39530GB | parker James Parker | 1K | — | 1 |
| AS208307GB | secondmind SECONDMIND LIMITED | 1K | — | 1 |
| AS205996GB | Interfiber Interfiber Ltd | 1K | 65.5K | 2 |
| AS204258GB | vive-technologies-ltd Vive Technologies Ltd | 1K | 524.3K | 2 |
| AS211912GB | WHG-USE2 WHG Hosting Services Ltd | 1K | — | 4 |