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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.
3,132 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
| 512 |
| — |
| 2 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS201301GB | soundmouse-netwise Soundmouse Ltd | 512 | 131.1K | 4 |
| AS30909GB | FASTVISION Fastvision Limited | 512 | — | 2 |
| AS203728GB | AS_BAHU BAHU LTD | 512 | 1 | 3 |
| AS59803GB | cceip DATAQUEST (HEATHROW) LIMITED | 512 | — | 1 |
| AS216376GB | pinkfroot Pinkfroot Ltd | 512 | — | 1 |
| AS43178GB | TECHNOLABS Technolabs Networks Ltd. | 512 | — | 1 |
| AS60898GB | AQUIS-EXCHANGE Aquis Exchange Limited | 512 | — | 2 |
| AS214661GB | AliceNetwork ALICE NETWORKS LTD | 512 | — | 2 |
| AS51692GB | HyberHost Steven Smith trading as HyberHost | 512 | 33 | 5 |
| AS42214GB | GDNS Network Services Ltd. | 512 | 2 | 4 |
| AS50656GB | Optix-Software-ASN Optix Software Ltd | 512 | — | 2 |
| AS211189GB | ThermoFisher_EU Thermo Electron Ltd | 512 | — | 1 |
| AS206166GB | SCHRODERS-UK-AS Schroder Investment Management Limited | 512 | — | 2 |
| AS206143GB | asn-networked2 Networked Creativity LLP | 512 | — | 2 |
| AS203184GB | FNZ-EU FNZ HOLDINGS UK LIMITED | 512 | — | 2 |
| AS210282GB | FRONTIERDC-AS Frontier Technology Limited | 512 | — | 2 |
| AS203795GB | uk-fidelis-1-as FIDELIS MARKETING LIMITED | 512 | — | 2 |
| AS203812GB | GlobalDirectDeliveryLtd High Availability Hosting Limited | 512 | — | 2 |
| AS210404GB | TUNSTALL-UK Tunstall Healthcare (UK) Limited | 512 | — | 2 |
| AS41367GB | PSN-AS Wood Group UK Limited | 512 | — | 2 |
| AS34623GB | Netegral Astutium Limited | 512 | 1 | 2 |
| AS218774GB | UC-AS uno Ltd. | 512 | — | 1 |
| AS43851GB | LWBNET Etheroute Ltd | 512 | 1 | 3 |
| AS61093GB | SC Solution Computers Ltd | 512 | — | 2 |
| AS41839GB | ConcentrixEuropeLtd Concentrix Europe Limited | 512 | — | 2 |
| AS60688GB | CSPCORE CSP Partnership | 512 | — | 1 |
| AS203011GB | osgcloud OSG CLOUD LIMITED | 512 | — | 2 |
| AS50972GB | JamieOliver Jamie Oliver Ltd. | 512 | — | 1 |
| AS56335GB | NOCSULT Nocsult Ltd | 512 | — | 2 |
| AS201493GB | NSCEMEA1 ALVARIA TECHNOLOGIES UK LIMITED | 512 | — | 2 |
| AS212329GB | NETCRAFT Netcraft Ltd | 512 | 2 | 4 |
| AS200203GB | DATABRIDGE GLOBAL DATA BRIDGE INTERNATIONAL LIMITED | 512 | 8.2K | 4 |
| AS214098GB | hrzn-hosting Horizon Hosting Limited | 512 | 3 | 5 |
| AS204624GB | sycurio Sycurio Limited | 512 | — | 2 |
| AS202067GB | advantex Advantex Network Solutions Ltd | 512 | — | 2 |
| AS208915GB | HyperLink HYPERLXC MEDICAL LTD | 512 | 65.5K | 6 |
| AS205177GB | IVANTI-UK IVANTI UK LIMITED | 512 | — | 1 |
| AS42053GB | STARLING Starling Bank Limited | 512 | — | 2 |
| AS198071GB | BERCHSOLUTIONS-AS Berch Solutions Limited | 512 | 16 | 3 |
| AS210412GB | hampsteadfibre Hampstead Fibre Ltd | 512 | 524.3K | 3 |
| AS203064GB | PURPLECOMPUTING-AS Purple Computing Limited | 512 | — | 1 |
| AS28715GB | BrassHornComms Brass Horn Communications | 512 | 8.2K | 4 |
| AS59876GB | SHELFSPACE Thomas James Elliott | 512 | 1 | 3 |
| AS198652GB | SELECTEL-AS Selectel LTD | 512 | — | 2 |
| AS212601GB | Calastone Calastone Limited | 512 | — | 2 |