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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 |
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| AS213509GB | ARESHOSTING ARES HOSTING LIMITED | — | — | 0 |
| AS212263GB | AS-ROCKETFIBRE Rocket Fibre Ltd | — | — | 0 |
| AS214332GB | IXMidlands-Route-Servers Exascale Ltd | — | — | 0 |
| AS212437GB | ADL ADT Defence Limited | — | — | 0 |
| AS210187GB | KEVINRICHARDSON-AS Kevin Richardson | — | — | 0 |
| AS197753GB | QUADV-AS QuadV Ltd | — | — | 0 |
| AS60897GB | MEDIRECT Binary Racks Limited | — | — | 0 |
| AS198136GB | FIX-RS Alioth Systems Limited | — | — | 0 |
| AS132006GB | DIOM-AS-AP - Domicilium (IOM) Ltd | — | — | 0 |
| AS47999GB | TCL-AS Verint Systems UK Limited | — | — | 0 |
| AS218886GB | PIIN-AS Pulsant Limited | — | — | 0 |
| AS30897GB | Pentagon-Systems RDS Global Limited | — | — | 0 |
| AS29202GB | Empics PA Media Group Ltd | — | — | 0 |
| AS12433GB | ORBTALK Telappliant Limited | — | — | 0 |
| AS211597GB | Litfibre Lit Fibre Group Ltd. | — | — | 0 |
| AS206900GB | APLNET Applecross Community Company | — | — | 0 |
| AS205750GB | Threadneedle_Asset_Management_Holdings_Ltd Threadneedle Asset Management Holdings Ltd | — | — | 0 |
| AS202488GB | balticbroadband Baltic Broadband Limited | — | — | 0 |
| AS200143GB | KWZTECH KWZ Technologies Ltd. | — | — | 0 |
| AS211438GB | SIC-AS Shetland Islands Council | — | — | 0 |
| AS49503GB | IDE-GROUP-MANAGE MAINFRAME & CYBERNETIC SYSTEMS LIMITED | — | — | 0 |
| AS48562GB | EQUINIX-CLOUD-EXCHANGE-DUBAI-ASN EQUINIX (SERVICES) LIMITED | — | — | 0 |
| AS215905GB | AS_10VPN_ANYCAST 10VPN Research Network LTD | — | — | 0 |
| AS206307GB | aeromobile Aeromobile Communications Limited | — | — | 0 |
| AS205552GB | AS_BITS LOTS OF BITS LTD | — | — | 0 |
| AS203397GB | curveit CURVE INFORMATION TECHNOLOGY LIMITED | — | — | 0 |
| AS201798GB | ABINTERNET Bogons Ltd | — | — | 0 |
| AS198796GB | PEARSON-HARPER Phusion IM Limited | — | — | 0 |
| AS61245GB | lovehosting Yorkshire Tech Limited | — | — | 0 |
| AS44474GB | Spectron-Services-Ltd Marex Financial Ltd | — | — | 0 |
| AS44360GB | IPASSETS Bink Group Ltd | — | — | 0 |
| AS44488GB | IXBRIGHTON Brighton Digital Exchange Cooperative Limited | — | — | 0 |
| AS28816GB | CHESS-ICT-MAN Chess ICT Ltd | — | — | 0 |
| AS218891GB | LIGHTBYTE-AS LIGHTBYTE LTD | — | — | 0 |
| AS205986GB | GLYN-Research-Ltd GLYN Research Limited | — | — | 0 |
| AS210996GB | HO-LECN-GUC UK Home Office (The Secretary of State for the Home Department) | — | — | 0 |
| AS209536GB | Marex-SA-AS Spectron Services Limited | — | — | 0 |
| AS210727GB | BuyLtd Buy Limited | — | — | 0 |
| AS202415GB | IDSI-2 Integrated Digital Services Ltd | — | — | 0 |
| AS199748GB | CCN-UK Voneus Ltd | — | — | 0 |
| AS56726GB | fouron 4on LTD | — | — | 0 |
| AS50711GB | SYN-ANY SYN LTD | — | — | 0 |
| AS199766GB | JNET Julita Nowacki | — | — | 0 |
| AS35545GB | Clouvider-Anycast Clouvider Limited | — | — | 0 |
| AS24669GB | CLOUVIDER-NETWORK-OPTIMISATION Clouvider Limited | — | — | 0 |
| AS20629GB | UK-BIS Six Degrees Technology Group Limited | — | — | 0 |