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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 | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 976.9K | 4,012 |
| 2K |
| — |
| 1 |
| AS59933GB | SENSICAL Sensical Services Limited | 2K | 65.5K | 4 |
| AS34746GB | AXA_INSURANCE AXA Insurance UK plc | 2K | — | 1 |
| AS34350GB | MANGROUP Man Investments Limited | 2K | — | 5 |
| AS21130GB | IOMART-IE IOMART CLOUD SERVICES LIMITED | 2K | 1 | 6 |
| AS51572GB | CERULEAN Cerulean Solutions Limited | 2K | — | 1 |
| AS39103GB | as_moat Moat Homes Limited | 2K | — | 3 |
| AS60736GB | The-Internet-Group KOCHO GROUP LIMITED | 2K | — | 3 |
| AS25108GB | IOMART-APAC-AS Iomart Managed Services Limited | 2K | 65.5K | 6 |
| AS205309GB | prodec_networks Prodec Networks Ltd | 2K | — | 3 |
| AS205693GB | dvla Driver & Vehicle Licensing Agency | 2K | — | 4 |
| AS210757GB | BSL Blackbird Solutions Limited | 2K | — | 5 |
| AS34654GB | IONIC-AS Merula Limited | 2K | — | 1 |
| AS56745GB | KALNET4U Kalnet4u Ltd | 2K | 65.5K | 2 |
| AS208522GB | uk-optimus Optimus Networks LTD | 2K | — | 3 |
| AS27263GB | NUHL - NATURA &Co UK HOLDINGS LIMITED | 2K | — | 2 |
| AS203363GB | KUROIT Kuroit Limited | 2K | 2 | 10 |
| AS41400GB | GNOL-AS R.M. Wotton T/A G-Net Online | 2K | 524.3K | 3 |
| AS50202GB | HISCOXGROUP-AS Hiscox Underwriting Group Services Ltd | 2K | — | 4 |
| AS34922GB | NETNAMES CSC Administrative Services Limited | 2K | — | 5 |
| AS31003GB | IRON-MOUNTAIN-UK-AS Iron Mountain Europe (Group) Limited | 2K | — | 2 |
| AS205290GB | NAOBOROT-AS NAOBOROT LLP | 2K | — | 8 |
| AS42536GB | Deloitte-UK Deloitte LLP | 2K | — | 1 |
| AS207195GB | ipwholesale Intelligent Exchanges Limited | 2K | 524.3K | 4 |
| AS201358GB | FNZ-UK FNZ (UK) Ltd | 2K | — | 3 |
| AS202466GB | qbeeo QBE Management Services (UK) Limited | 2K | — | 5 |
| AS200700GB | BMC_UK-1 BMC TV LTD | 2K | — | 5 |
| AS31223GB | EA-UK-LHR Electronic Arts Limited | 2K | — | 2 |
| AS215262GB | CLOUDNORD-UKNODE-AS Cloud Nord Limited | 2K | 1 | 7 |
| AS210814GB | VUNIFY VUNIFY LTD | 2K | — | 8 |
| AS207096GB | aslinkweb Link Web Solutions LLP | 2K | 524.3K | 5 |
| AS202206GB | MOTIVE FAT MEDIA LTD | 2K | — | 7 |
| AS44442GB | TelfordWrekinCouncilAS The Borough of Telford and Wrekin Council | 2K | — | 1 |
| AS209761GB | NECS North of England Commissioning Support Unit | 2K | — | 3 |
| AS35259GB | APM APM Internet Ltd | 2K | — | 1 |
| AS60925GB | BPP-ASN BPP Services Limited | 2K | — | 1 |
| AS11856GB | XCONNECT-TECH - XC Technology Holdings LTD | 2K | — | 3 |
| AS59493GB | MIMIC Cudo Ventures Ltd | 2K | 196.6K | 5 |
| AS209611GB | HFLBROADBAND HFLBroadband Ltd | 2K | — | 3 |
| AS47113GB | SLP Suffolk Life Pensions Limited | 2K | — | 1 |
| AS15689GB | ASNUM-ORG-AISN1-RIPE Advanced IT Services Nottingham Ltd | 2K | 524.3K | 2 |
| AS28729GB | FORD-AS Ford Motor Company Limited | 2K | 1 | 2 |
| AS42466GB | METEORIC-AS Meteoric Ltd | 2K | — | 1 |
| AS202312GB | SMBCNIKKOCM SMBC Bank International plc | 2K | 65.5K | 7 |
| AS199954GB | Techwareca Techwareca Ltd. | 2K | 524.3K | 2 |
| AS21448GB | MWIL Integrated Digital Services Ltd | 2K | — | 2 |
| AS49829GB | ADM-ASN ADM COMPUTER SERVICES LIMITED | 2K | — | 3 |