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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 |
| — |
| 2 |
| AS213840GB | DDOS-PROTECTION-LTD DDOS PROTECTION LTD | 512 | — | 2 |
| AS214260GB | ITCommunications I.T Communications Limited | 512 | — | 2 |
| AS137037GB | VEBBLEPVTLTD-AS-AP - VEBBLE PVT LTD. | 512 | 1 | 3 |
| AS199886GB | SB-AS Shetland Broadband LLP | 512 | — | 2 |
| AS62299GB | BLUEMATRIX-AS Bluematrix Research LTD | 512 | — | 2 |
| AS8619GB | closebrothers-as Close Brothers Limited | 512 | — | 2 |
| AS48682GB | IPSL IP Space Limited | 512 | — | 2 |
| AS212660GB | WHG-DXB1 WHG Hosting Services Ltd | 512 | — | 2 |
| AS204322GB | uk-nyt-lhr1 New York Times Limited | 512 | — | 1 |
| AS211020GB | asrokatansky LOBOS NETWORKING LTD | 512 | — | 2 |
| AS43851GB | LWBNET Etheroute Ltd | 512 | 1 | 3 |
| AS219369GB | C2T ConstructInTech Limited | 512 | 2 | 4 |
| AS215742GB | Duplia Duplia Ltd | 512 | 65.5K | 3 |
| AS61093GB | SC Solution Computers Ltd | 512 | — | 2 |
| AS199720GB | icbcs ICBC Standard Bank PLC | 512 | — | 2 |
| AS215662GB | KENSINGTON KENSINGTON MORTGAGE COMPANY LIMITED | 512 | — | 2 |
| AS47571GB | DCMANAGED Digital Craftsmen Ltd. | 512 | — | 2 |
| AS215320GB | AlncomAS2 ALNWICK COMPUTERWARE LTD. | 512 | 131.1K | 3 |
| AS202574GB | ASN-VLE VLE LIMITED | 512 | — | 2 |
| AS44480GB | Brevan-Howard-AS Brevan Howard Asset Management LLP | 512 | — | 2 |
| AS59619GB | Blackpool-AS Blackpool Borough Council | 512 | — | 2 |
| AS203795GB | uk-fidelis-1-as FIDELIS MARKETING LIMITED | 512 | — | 2 |
| AS211077GB | HO-LECN-DC01 UK Home Office (The Secretary of State for the Home Department) | 512 | — | 2 |
| AS210924GB | SSDNetworks SSD Networks Limited | 512 | 524.3K | 3 |
| AS58102GB | TWODMEDIA 2Dmedia Ltd. | 512 | 1 | 2 |
| AS198142GB | Warrington-AS Warrington Borough Council | 512 | — | 2 |
| AS213482GB | WATERFALL Waterfall Technologies Ltd | 512 | 135.3K | 14 |
| AS197342GB | Aepona-BFS PERSISTENT SYSTEMS UK LIMITED | 512 | — | 2 |
| AS201478GB | REDI_TECH Refinitiv Limited | 512 | — | 2 |
| AS216026GB | Smart-Technology-Advisers Smart Technology Advisers Ltd | 512 | — | 2 |
| AS214670GB | NOMETRIC-NET No Metric Limited | 512 | 131.1K | 4 |
| AS213921GB | DA-MOTORS-AS DAVID ASCOTT MOTORS LTD | 512 | — | 2 |
| AS208417GB | EONSCOPE SECUREEND LTD | 512 | — | 2 |
| AS48397GB | Unipart-AS Unipart Group Limited | 512 | — | 2 |
| AS216274GB | uk-gigaloch Gigaloch Limited | 512 | 262.1K | 3 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS57740GB | HERMES-DATACOMMS Hermes Datacommunications International Limited | 512 | — | 2 |
| AS216307GB | HYPERHOST-AS Hyperhost Solutions Limited | 512 | 1 | 3 |
| AS215981GB | X-Fibre X-Fibre Ltd | 512 | — | 2 |
| AS33981GB | TSYS-AS Total System Services Processing Europe Limited | 512 | — | 2 |
| AS51762GB | BDC-ADV-UK Adversor LLP | 512 | — | 2 |
| AS59724GB | REED-ELSEVIER-EMEA-GCC Elsevier Limited | 512 | — | 2 |
| AS43486GB | MSUI1-AS Mizuho Bank Ltd | 512 | — | 2 |
| AS42214GB | GDNS Network Services Ltd. | 512 | 2 | 4 |
| AS56335GB | NOCSULT Nocsult Ltd | 512 | — | 2 |
| AS211675GB | LAYERSHIFT-NETWORKS Layershift Limited | 512 | 65.5K | 2 |