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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.
3,132 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 | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
| 2K |
| — |
| 8 |
| AS200961GB | FWI2-ASN FIL INVESTMENT MANAGEMENT LIMITED | 2K | — | 8 |
| AS35838GB | CCANET CCANET Limited | 2K | — | 1 |
| AS31003GB | IRON-MOUNTAIN-UK-AS Iron Mountain Europe (Group) Limited | 2K | — | 2 |
| AS206547GB | CDK-Global-EU Keyloop Holdings (UK) Limited | 2K | — | 4 |
| AS12290GB | EXONETRIC Exonetric Consulting Ltd | 2K | 65.5K | 2 |
| AS200700GB | BMC_UK-1 BMC TV LTD | 2K | — | 5 |
| AS49829GB | ADM-ASN ADM COMPUTER SERVICES LIMITED | 2K | — | 3 |
| AS51439GB | AIG-EUROPE-SERVICES-LTD AIG Europe (Services) Limited | 2K | 3 | 7 |
| AS35299GB | ASC2k C2k | 2K | — | 1 |
| AS21448GB | MWIL Integrated Digital Services Ltd | 2K | — | 2 |
| AS15689GB | ASNUM-ORG-AISN1-RIPE Advanced IT Services Nottingham Ltd | 2K | 524.3K | 2 |
| AS201542GB | micloud Mitel Networks Limited | 2K | — | 5 |
| AS204436GB | KUALO-AS Kualo Limited | 2K | 65.5K | 3 |
| AS207195GB | ipwholesale Intelligent Exchanges Limited | 2K | 524.3K | 4 |
| AS44442GB | TelfordWrekinCouncilAS The Borough of Telford and Wrekin Council | 2K | — | 1 |
| AS202312GB | SMBCNIKKOCM SMBC Bank International plc | 2K | 65.5K | 7 |
| AS201933GB | AS4NET 4net Technologies Ltd | 2K | 524.3K | 5 |
| AS210970GB | mosento mosento LTD | 2K | — | 8 |
| AS49418GB | AS-NETSHIELD NETSHIELD LTD | 2K | 68 | 13 |
| AS205373GB | rightmove Rightmove Group Limited | 2K | 65.5K | 10 |
| AS34922GB | NETNAMES CSC Administrative Services Limited | 2K | — | 5 |
| AS11856GB | XCONNECT-TECH - XC Technology Holdings LTD | 2K | — | 3 |
| AS42775GB | DSRT-NET ADWORLDS TECHNOLOGIES LP | 2K | 1 | 4 |
| AS61012GB | LIVEDRIVE Livedrive Internet Ltd. | 2K | 65.5K | 4 |
| AS21188GB | UNILEVER-ES-UK Unilever PLC | 2K | — | 4 |
| AS205693GB | dvla Driver & Vehicle Licensing Agency | 2K | — | 4 |
| AS42536GB | Deloitte-UK Deloitte LLP | 2K | — | 1 |
| AS202206GB | MOTIVE FAT MEDIA LTD | 2K | — | 7 |
| AS50063GB | SAINSBURYS-NET Sainsbury's Supermarkets Ltd | 2K | — | 1 |
| AS206411GB | FASTWARP-LLP Fastwarp LLP | 2K | — | 8 |
| AS213495GB | SERVITRO-LTD SERVITRO LTD | 2K | 1 | 9 |
| AS205309GB | prodec_networks Prodec Networks Ltd | 2K | — | 3 |
| AS42466GB | METEORIC-AS Meteoric Ltd | 2K | — | 1 |
| AS28729GB | FORD-AS Ford Motor Company Limited | 2K | 1 | 2 |
| AS50948GB | amdocs-uk-dc-as AMDOCS (UK) LIMITED | 2K | — | 6 |
| AS218799GB | LITE-DIGITAL LITE DIGITAL LTD | 2K | — | 8 |
| AS48070GB | DSM DSM (GB) Limited | 2K | 131.1K | 10 |
| AS50422GB | RBS-GBM Natwest Markets PLC | 2K | — | 6 |
| AS60736GB | The-Internet-Group KOCHO GROUP LIMITED | 2K | — | 3 |
| AS34350GB | MANGROUP Man Investments Limited | 2K | — | 5 |
| AS51572GB | CERULEAN Cerulean Solutions Limited | 2K | — | 1 |
| AS49694GB | UK-FR-MNLTD Masternaut Limited | 2K | 3 | 11 |
| AS198990GB | PINEHOST-NET Pine Hosting LTD | 1.8K | — | 4 |
| AS48447GB | Sectigo Sectigo Limited | 1.8K | 65.5K | 5 |
| AS41099GB | globalreach Global Reach Networks Limited | 1.8K | — | 7 |
| AS203185GB | PebbleTree PEBBLETREE LTD | 1.8K | 3 | 10 |