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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 | 331 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 256 |
| — |
| 1 |
| AS198222GB | WHC-AS West Herts College | 256 | — | 1 |
| AS34900GB | CME-AS-LO2-2 CME Operations Limited | 256 | — | 1 |
| AS47935GB | QUANTUMUK-AS Quantum Communications Ltd | 256 | 65.5K | 2 |
| AS56929GB | WBC-NET WANDSWORTH-BOROUGH-COUNCIL | 256 | — | 1 |
| AS39715GB | platinumhedgehog PLATINUM HEDGEHOG CONSULTANCY LIMITED | 256 | — | 1 |
| AS209870GB | Cylo Cylo Ltd | 256 | — | 1 |
| AS214199GB | luxxysystems Johnathan Hine | 256 | 2 | 3 |
| AS215003GB | TUBES_AS Internet Tubes LTD | 256 | — | 1 |
| AS12613GB | FIREBRICK-AS Firebrick Limited | 256 | — | 1 |
| AS42046GB | ITN Independent Television News Limited | 256 | — | 1 |
| AS60431GB | PNO-AS PNO Solutions Limited | 256 | 49 | 5 |
| AS207295GB | Akhtar Akhtar Technologies Limited | 256 | — | 1 |
| AS59902GB | Frankfurt IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS9014GB | CEFAS Centre for Environment Fisheries and Aquaculture Science (CEFAS) | 256 | — | 1 |
| AS211431GB | AndrewA Andrew Aubury | 256 | 369 | 10 |
| AS198801GB | YOUR-HOUSING-GROUP-AS Your Housing Group Ltd | 256 | — | 1 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS198375GB | DELUSION-NET Delusion Limited | 256 | 1 | 2 |
| AS59756GB | ENQUEST-AS Enquest Britain Limited | 256 | — | 1 |
| AS213893GB | IPTR-AS IPTransit Business LTD | 256 | — | 1 |
| AS61283GB | MILLAR Andrew Millar Ltd | 256 | 1 | 2 |
| AS203589GB | HOSTWEAVE-AS HOSTWEAVE LTD | 256 | 256 | 2 |
| AS212788GB | edgenet Edge Network Technologies Ltd | 256 | — | 1 |
| AS199131GB | CITY-OF-YORK-COUNCIL City of York Council | 256 | — | 1 |
| AS213000GB | ASAML Alliance Medical Limited | 256 | — | 1 |
| AS150325GB | TSUKUDANI-NETWORK - TSUKUDANI NETWORK | 256 | 4 | 5 |
| AS207748GB | FRASER-AS Stephen Fraser | 256 | 19 | 5 |
| AS197685GB | ONIONRING Onionring Limited | 256 | — | 1 |
| AS57377GB | LONDON-BOROUGH-OF-MERTON LONDON BOROUGH OF MERTON | 256 | — | 1 |
| AS211803GB | AS_INTER_ACT CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS204089GB | ADML Apollo Duck Media Ltd | 256 | 524.3K | 2 |
| AS197622GB | PARSELY-AS NEXTTRANSLATE LTD | 256 | — | 1 |
| AS43851GB | LWBNET Etheroute Ltd | 256 | 1 | 2 |
| AS196839GB | VU-AS Amplefuture Group Limited | 256 | — | 1 |
| AS197387GB | Betfair-DC3 The Sporting Exchange (Clients) Ltd | 256 | — | 1 |
| AS199129GB | DIRECTCONNECT-AS Direct Connect (ISP) Ltd | 256 | — | 1 |
| AS200251GB | cwg Cineworld Cinemas Limited | 256 | — | 1 |
| AS197284GB | K3X-MNT K3X SYSTEMS Ltd | 256 | 1 | 2 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS202532GB | MBYTECHNOLOGY Mbytechnology Limited | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS210456GB | EastCostHosting EastCoastHost Ltd | 256 | 1 | 2 |
| AS56739GB | DICO PRT Systems Limited | 256 | — | 1 |
| AS212868GB | GLITCH-SERVERS CHAPMAN Adam | 256 | 1 | 2 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |