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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
| — |
| 6 |
| AS206049GB | COMMUNICATE Communicate Technology LTD | 1.5K | 262.1K | 4 |
| AS211500GB | AS_NOTAHST LOBOS NETWORKING LTD | 1.5K | — | 3 |
| AS41355GB | CATALYST2-RDG Team Blue Carrier Limited | 1.5K | 65.5K | 4 |
| AS204321GB | uk-nyt-cdg1 New York Times Limited | 1.5K | — | 3 |
| AS218914GB | DATAGIONET-AS Datagio Systems Ltd. | 1.5K | 7 | 13 |
| AS209452GB | ZuriTechnologies Zuri Technologies Limited | 1.5K | — | 3 |
| AS205502GB | Inception Inception Hosting Limited | 1.5K | — | 6 |
| AS44745GB | FIDESSA-AS Fidessa PLC | 1.5K | — | 4 |
| AS64435GB | comgw The Communication GATEWAY LTD | 1.5K | 65.5K | 4 |
| AS216405GB | MSUK-ISP Metric Systems UK LTD | 1.5K | 2 | 8 |
| AS205545GB | E-WIRE JIWA Holdings Ltd | 1.5K | — | 3 |
| AS41379GB | NTA-AS Nationwide Telephone Assistance Ltd | 1.5K | — | 3 |
| AS213229GB | MITELIS MITELIS SECURITY LIMITED | 1.5K | 1 | 7 |
| AS60868GB | BRANDWATCH-AS Runtime Collective Limited | 1.5K | 65.5K | 4 |
| AS44706GB | ASN-SPACTRON Monty UK Global Limited | 1.5K | — | 6 |
| AS42217GB | GOODWOOD The Goodwood Estate Company Limited | 1.5K | 524.3K | 4 |
| AS12761GB | COLT-CORP-IT COLT Technology Services Group Limited | 1.5K | — | 6 |
| AS210495GB | WENIUM WENIUM LTD | 1.5K | 16 | 7 |
| AS203177GB | PINNACA New Era Technology UK LTD | 1.5K | — | 6 |
| AS200636GB | PARAVIRT Paravirt LTD | 1.5K | — | 6 |
| AS206629GB | MINISTRYOFJUSTICE Ministry of Justice | 1.5K | — | 6 |
| AS59445GB | ICC-AS ICC NETWORKS LTD | 1.5K | — | 3 |
| AS44934GB | ARACHSYS Arachsys Internet Services Ltd | 1.5K | 65.5K | 5 |
| AS205719GB | FORESTSNET FORESTSNET LTD | 1.5K | 2 | 8 |
| AS48412GB | pod Podsystem Limited | 1.5K | — | 3 |
| AS47768GB | INTISTELECOM-AS UK Intis Telecom LTD | 1.5K | 1 | 4 |
| AS60507GB | HML2-EUR-AS Hillside (Technology) Ltd | 1.5K | — | 3 |
| AS205114GB | wrtgltd The WEST Retail group LImited | 1.5K | — | 5 |
| AS201579GB | HOSTGNOME-AS HOSTGNOME LTD | 1.5K | 528.4K | 8 |
| AS197283GB | PowerRDP-Network-AS PowerRDP Network LTD | 1.5K | — | 6 |
| AS210667GB | SMISHCRAFT Adam Goodenough | 1.5K | 19 | 25 |
| AS21233GB | ASN-C2INTERNET Atlas Business Group of Companies Ltd | 1.5K | 65.5K | 7 |
| AS42513GB | NATILIK-AS Natilik Ltd | 1.5K | — | 4 |
| AS205842GB | LINKWEBSOLUTIONS Link Web Solutions LLP | 1.5K | — | 3 |
| AS196745GB | DATACENTA-AS Datacenta Hosting Ltd | 1.5K | 11 | 17 |
| AS60228GB | C24-AS Six Degrees Technology Group Limited | 1.5K | 98.3K | 4 |
| AS43584GB | MAYTECH-ASN Maytech Communications Ltd | 1.5K | — | 4 |
| AS58144GB | ASN-TSC THE STREAMING COMPANY.COM LIMITED | 1.5K | — | 3 |
| AS35832GB | BGFL Birmingham City Council | 1.5K | — | 5 |
| AS50132GB | WRG-AS 3nt solutions LLP | 1.5K | — | 6 |
| AS200164GB | RHG-AS The Random House Group Limited | 1.5K | — | 3 |
| AS44955GB | DG-TECHNOLOGY DG Infrastructure Ltd | 1.5K | — | 6 |
| AS60038GB | TAMG TripAdvisor Limited | 1.5K | — | 3 |
| AS204592GB | COSMOS-AS Cosmos Wireless Ltd | 1.5K | — | 6 |
| AS210206GB | METROSECURITY-AS Metro Security (GB) PLC | 1.3K | 589.8K | 6 |
| AS59817GB | OXLETECH Oxletech Limited | 1.3K | 65.5K | 5 |