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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 |
| 512 |
| 2 |
| 2 |
| AS205177GB | IVANTI-UK IVANTI UK LIMITED | 512 | — | 1 |
| AS60898GB | AQUIS-EXCHANGE Aquis Exchange Limited | 512 | — | 2 |
| AS209735GB | LAGRANGE Lagrange Cloud Technologies Limited | 512 | 3 | 5 |
| AS203064GB | PURPLECOMPUTING-AS Purple Computing Limited | 512 | — | 1 |
| AS48682GB | IPSL IP Space Limited | 512 | — | 2 |
| AS203861GB | MITEFLUX-AS Miteflux Technologies Ltd | 512 | — | 2 |
| AS212656GB | UK-3VEREST 3verest Limited | 512 | — | 2 |
| AS215854GB | DC-3-PROJECT Exponential-E Ltd. | 512 | — | 2 |
| AS199720GB | icbcs ICBC Standard Bank PLC | 512 | — | 2 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS215419GB | karizanta Karizanta LTD | 512 | 2 | 4 |
| AS58102GB | TWODMEDIA 2Dmedia Ltd. | 512 | 1 | 2 |
| AS57483GB | ICHILTON Ian Chilton | 512 | 14 | 16 |
| AS47611GB | WMI-UK-LON Warner Music International Services Limited | 512 | — | 2 |
| AS201301GB | soundmouse-netwise Soundmouse Ltd | 512 | 131.1K | 4 |
| AS60654GB | METD-AS Metdesk Ltd | 512 | — | 2 |
| AS34930GB | HAL LHR AIRPORTS LIMITED | 512 | — | 2 |
| AS204921GB | YunZheng-Network zhenyun sun | 512 | 23 | 10 |
| AS211189GB | ThermoFisher_EU Thermo Electron Ltd | 512 | — | 1 |
| AS200203GB | DATABRIDGE GLOBAL DATA BRIDGE INTERNATIONAL LIMITED | 512 | 8.2K | 4 |
| AS198071GB | BERCHSOLUTIONS-AS Berch Solutions Limited | 512 | 16 | 3 |
| AS208026GB | LITTLEWOODS LITTLEWOODS LTD | 512 | — | 2 |
| AS47581GB | NSFOCUS NSFOCUS Technologies UK Limited | 512 | — | 2 |
| AS216307GB | HYPERHOST-AS Hyperhost Solutions Limited | 512 | 1 | 3 |
| AS203251GB | AlchemySystems Alchemy Systems International Limited | 512 | — | 1 |
| AS210203GB | RETN-IT-AS RETN Limited | 512 | — | 1 |
| AS5586GB | MCI-INT Verizon UK Limited | 512 | 32 | 3 |
| AS216026GB | Smart-Technology-Advisers Smart Technology Advisers Ltd | 512 | — | 2 |
| AS209765GB | AspireMedia ASPIRE MEDIA GROUP LIMITED | 512 | — | 2 |
| AS51329GB | CONNET-AS CONNECTION NETWORKS L.P. | 512 | — | 2 |
| AS210253GB | CREATIVE-NETWORK-CONSULTING-AS Creative Network Consulting Limited | 512 | — | 2 |
| AS204844GB | NCSE-NETWORK-Global NCSE NETWORK LTD | 512 | 4.4K | 16 |
| AS215821GB | AS215821 London Digital Systems LTD | 512 | 1 | 3 |
| AS41596GB | WGSL-AS Willis Group Services Ltd | 512 | — | 2 |
| AS203728GB | AS_BAHU BAHU LTD | 512 | 1 | 3 |
| AS41570GB | SSVC-AS BFBS | 512 | — | 2 |
| AS204550GB | continental-ltd Continental Limited | 512 | 65.5K | 3 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS205705GB | JDL-AS JDL Enterprises Limited | 512 | 2 | 4 |
| AS213534GB | GardnersBooks Gardners Books Ltd | 512 | — | 2 |
| AS205359GB | precisely-ltd Precisely Software Ltd | 512 | — | 2 |
| AS197407GB | CUCE CHINA UNICOM (EUROPE) OPERATIONS LIMITED | 512 | — | 2 |
| AS212329GB | NETCRAFT Netcraft Ltd | 512 | 2 | 4 |
| AS48397GB | Unipart-AS Unipart Group Limited | 512 | — | 2 |
| AS49313GB | SEVAHOST-AS Seva-Host Ltd | 512 | — | 2 |
| AS50078GB | X-ON X-ON HEALTH LIMITED | 512 | — | 2 |