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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.
3,134 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 | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
| 512 |
| — |
| 1 |
| AS216376GB | pinkfroot Pinkfroot Ltd | 512 | — | 1 |
| AS43669GB | ACSL2 Axia Computer Systems Limited | 512 | — | 2 |
| AS204624GB | sycurio Sycurio Limited | 512 | — | 2 |
| AS51692GB | HyberHost Steven Smith trading as HyberHost | 512 | 33 | 5 |
| AS210924GB | SSDNetworks SSD Networks Limited | 512 | 524.3K | 3 |
| AS213549GB | SATISFYHOST SATISFYHOST LTD | 512 | 3 | 5 |
| AS28715GB | BrassHornComms Brass Horn Communications | 512 | 8.2K | 4 |
| AS49607GB | AdvancePayment ZEMPLER BANK LIMITED | 512 | — | 2 |
| AS199204GB | WebMate Webmate Internet Services Ltd. | 512 | — | 1 |
| AS51087GB | BLING-AS Bling Network Ltd | 512 | 1.1K | 23 |
| AS203652GB | IBMUK IBM United Kingdom Limited | 512 | — | 2 |
| AS215981GB | X-Fibre X-Fibre Ltd | 512 | — | 2 |
| AS219463GB | THEBATTLE-GROUP-LTD THEBATTLE GROUP LTD | 512 | — | 2 |
| AS197407GB | CUCE CHINA UNICOM (EUROPE) OPERATIONS LIMITED | 512 | — | 2 |
| AS214670GB | NOMETRIC-NET No Metric Limited | 512 | 131.1K | 4 |
| AS219369GB | C2T ConstructInTech Limited | 512 | 2 | 4 |
| AS205359GB | precisely-ltd Precisely Software Ltd | 512 | — | 2 |
| AS212035GB | Babcock_International Babcock Corporate Services Ltd | 512 | — | 2 |
| AS208781GB | UK-SMARTCT1-20190320 SMART CT LIMITED | 512 | — | 1 |
| AS200950GB | CalibourNetwork Calibour Limited | 512 | 66.4K | 14 |
| AS211020GB | asrokatansky LOBOS NETWORKING LTD | 512 | — | 2 |
| AS60898GB | AQUIS-EXCHANGE Aquis Exchange Limited | 512 | — | 2 |
| AS212329GB | NETCRAFT Netcraft Ltd | 512 | 2 | 4 |
| AS51845GB | WATERSTONS-AS WATERSTONS LIMITED | 512 | — | 2 |
| AS210412GB | hampsteadfibre Hampstead Fibre Ltd | 512 | 524.3K | 3 |
| AS50972GB | JamieOliver Jamie Oliver Ltd. | 512 | — | 1 |
| AS208026GB | LITTLEWOODS LITTLEWOODS LTD | 512 | — | 2 |
| AS198142GB | Warrington-AS Warrington Borough Council | 512 | — | 2 |
| AS50656GB | Optix-Software-ASN Optix Software Ltd | 512 | — | 2 |
| AS215675GB | perceptiontvcdn Perception TVCDN Ltd | 512 | — | 2 |
| AS208755GB | NETWORKABLE Thomas Ferguson | 512 | 17 | 4 |
| AS212646GB | SSLN-AS Sporting Solutions Services Limited | 512 | — | 2 |
| AS215162GB | TROOLI Trooli Ltd. | 512 | 512 | 4 |
| AS207108GB | ahcloud AH CLOUD LTD | 512 | 5 | 7 |
| AS42053GB | STARLING Starling Bank Limited | 512 | — | 2 |
| AS198863GB | CUP-AS Cambridge University Press (Holdings) Limited | 512 | — | 1 |
| AS200008GB | PIRUM-AS Pirum Systems Limited | 512 | 524.3K | 3 |
| AS211189GB | ThermoFisher_EU Thermo Electron Ltd | 512 | — | 1 |
| AS204322GB | uk-nyt-lhr1 New York Times Limited | 512 | — | 1 |
| AS43486GB | MSUI1-AS Mizuho Bank Ltd | 512 | — | 2 |
| AS211476GB | techloq-uk Techloq Limited | 512 | 65.5K | 3 |
| AS51983GB | SARGASSO-DE-AS Sargasso N1 Limited | 512 | — | 1 |
| AS214260GB | ITCommunications I.T Communications Limited | 512 | — | 2 |
| AS214555GB | Treasury Treasury Limited | 512 | 524.3K | 10 |
| AS209765GB | AspireMedia ASPIRE MEDIA GROUP LIMITED | 512 | — | 2 |
| AS57483GB | ICHILTON Ian Chilton | 512 | 14 | 16 |