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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 | 4,127 |
| 512 |
| — |
| 2 |
| AS199262GB | TfL-FPS-AS Transport for London | 512 | — | 1 |
| AS214098GB | hrzn-hosting Horizon Hosting Limited | 512 | 3 | 5 |
| AS199720GB | icbcs ICBC Standard Bank PLC | 512 | — | 2 |
| AS210253GB | CREATIVE-NETWORK-CONSULTING-AS Creative Network Consulting Limited | 512 | — | 2 |
| AS3252GB | FBRX-AS Fiberax Networking&Cloud Ltd. | 512 | — | 2 |
| AS33981GB | TSYS-AS Total System Services Processing Europe Limited | 512 | — | 2 |
| AS205359GB | precisely-ltd Precisely Software Ltd | 512 | — | 2 |
| AS48397GB | Unipart-AS Unipart Group Limited | 512 | — | 2 |
| AS200682GB | TLC-ASN Trustees of the London Clinic Limited | 512 | — | 2 |
| AS200203GB | DATABRIDGE GLOBAL DATA BRIDGE INTERNATIONAL LIMITED | 512 | 8.2K | 4 |
| AS197860GB | NET-HARUKA Haruka Network Limited | 512 | 33 | 5 |
| AS50224GB | AS50224 MTRL GROUP LIMITED | 512 | 1 | 3 |
| AS39592GB | IGX0-AS Benjamin Ashton | 512 | — | 2 |
| AS204921GB | YunZheng-Network zhenyun sun | 512 | 27 | 14 |
| AS215187GB | PROMISED God Promised Me Networks LTD | 512 | — | 2 |
| AS33975GB | NETCONSULT-AS NetConsult Ltd | 512 | — | 1 |
| AS137037GB | VEBBLEPVTLTD-AS-AP - VEBBLE PVT LTD. | 512 | 1 | 3 |
| AS57740GB | HERMES-DATACOMMS Hermes Datacommunications International Limited | 512 | — | 2 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS35559GB | SOMEADDRESS Someaddress Networks Ltd | 512 | 2 | 2 |
| AS203184GB | FNZ-EU FNZ HOLDINGS UK LIMITED | 512 | — | 2 |
| AS209735GB | LAGRANGE Lagrange Cloud Technologies Limited | 512 | 2 | 4 |
| AS204844GB | NCSE-NETWORK-Global NCSE NETWORK LTD | 512 | 4.4K | 16 |
| AS204910GB | ORG-SNL103-RIPE SUDATECH NETWORKS LIMITED | 512 | 16 | 3 |
| AS41367GB | PSN-AS Wood Group UK Limited | 512 | — | 2 |
| AS209765GB | AspireMedia ASPIRE MEDIA GROUP LIMITED | 512 | — | 2 |
| AS201497GB | express-as STAT EXPRESS SERVICES LTD | 512 | — | 1 |
| AS202310GB | hyve-corp Hyve Ltd | 512 | 2 | 2 |
| AS212469GB | GREENCO-ISP ServerHouse Ltd | 512 | — | 1 |
| AS214199GB | luxxysystems Johnathan Hine | 512 | 2 | 4 |
| AS50287GB | AudatexUK Audatex (UK) Ltd | 512 | 16 | 3 |
| AS208176GB | HYVE-MANAGED-HOSTING Hyve Ltd | 512 | 4 | 4 |
| AS43669GB | ACSL2 Axia Computer Systems Limited | 512 | — | 2 |
| AS209260GB | SERVA-ONE-LTD SERVA ONE LTD | 512 | — | 2 |
| AS41596GB | WGSL-AS Willis Group Services Ltd | 512 | — | 2 |
| AS203064GB | PURPLECOMPUTING-AS Purple Computing Limited | 512 | — | 1 |
| AS206166GB | SCHRODERS-UK-AS Schroder Investment Management Limited | 512 | — | 2 |
| AS199301GB | SOLUTIONS-AS RLE SOLUTIONS LTD | 512 | — | 2 |
| AS201301GB | soundmouse-netwise Soundmouse Ltd | 512 | 131.1K | 4 |
| AS214455GB | RETN-AE-AS RETN Limited | 512 | — | 1 |
| AS198104GB | Bush-Broadband-Ltd Bush Broadband Limited | 512 | 524.3K | 3 |
| AS213460GB | simplisticnodeus SIMPLE COMMUNICATIONS LIMITED | 512 | — | 2 |
| AS207158GB | WORLDCDN Clouvider Limited | 512 | — | 2 |
| AS213493GB | NYRU NYRU Services Limited | 512 | — | 2 |
| AS214315GB | CUSHWAKE-IRE Cushman & Wakefield Debenham Tie Leung Limited | 512 | — | 2 |
| AS41570GB | SSVC-AS BFBS | 512 | — | 2 |