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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
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 | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 3.8K |
| — |
| 4 |
| AS25421GB | JOHN-LEWIS-AS John Lewis Plc. | 3.8K | — | 9 |
| AS41203GB | GEOPOST DPDgroup UK Ltd | 3.8K | — | 8 |
| AS198823GB | NETINT Network Integration Technologies LTD | 3.8K | — | 5 |
| AS57022GB | DATAVITA-AS HFD DATAVITA LIMITED | 3.8K | 1 | 12 |
| AS21301GB | UK-NATWEST-AS21301 Natwest Markets PLC | 3.8K | — | 10 |
| AS39884GB | VOIPFONE-AS iNet Telecoms Ltd | 3.8K | — | 4 |
| AS39208GB | IPILimited I.P. Integration Limited | 3.8K | 589.8K | 11 |
| AS213755GB | LUNORY-AS LUNORY CLOUD SOLUTIONS LTD | 3.8K | — | 15 |
| AS211612GB | cache77 Datacamp Limited | 3.8K | 66.1K | 13 |
| AS30938GB | abstation ahbr company limited | 3.8K | — | 5 |
| AS56382GB | VSERVERLTD vServer.site LTD | 3.8K | 23 | 23 |
| AS50113GB | SuperServersDatacenter FIRST SERVER LIMITED | 3.8K | 1M | 43 |
| AS41495GB | FAELIX Faelix Limited | 3.8K | 655.4K | 8 |
| AS8282GB | BINK Bink Group Ltd | 3.8K | 65.5K | 11 |
| AS57653GB | CTL-AS Central Technology Ltd | 3.8K | 65.5K | 6 |
| AS57994GB | ASN-IDCNET NetEarth UK Ltd | 3.6K | — | 14 |
| AS35707GB | Scottish-Power-PLC Scottish Power UK PLC | 3.6K | — | 5 |
| AS204413GB | HYVE-UK Hyve Ltd | 3.6K | 4 | 10 |
| AS24594GB | FSYS Voiceflex Ltd | 3.6K | 65.5K | 5 |
| AS213354GB | International-Hosting-Solutions-AS INTERNATIONAL HOSTING SOLUTIONS LLP | 3.6K | 256 | 7 |
| AS207045GB | wyless_asn_1 KORE WIRELESS UK LIMITED | 3.6K | — | 8 |
| AS41362GB | BGNET Royal London Management Services Limited | 3.6K | — | 13 |
| AS28939GB | ARM-AS ARM Ltd | 3.6K | — | 14 |
| AS57148GB | TBSH-CLIENT-TRISTAR-BYTEHOUSE Bytehouse Ltd | 3.6K | — | 5 |
| AS202161GB | PGDS-ASN1 M&G INVESTMENT MANAGEMENT LIMITED | 3.6K | — | 14 |
| AS43013GB | YorkDataServices Communicate Technology LTD | 3.6K | — | 3 |
| AS62059GB | CONWAYBB16-AS Turbo Leisure Ltd | 3.6K | 65.5K | 4 |
| AS61419GB | THECLOUDSIMPLIFIED The Cloud Simplified Limited | 3.6K | — | 4 |
| AS59888GB | Marmin MARMIN Ltd | 3.6K | 524.3K | 5 |
| AS41847GB | STEALTH-NETWORKS Daniel O'Mahony | 3.6K | 1 | 10 |
| AS57307GB | BLAZE-NETWORKS Communicate Technology LTD | 3.3K | — | 3 |
| AS42705GB | Talia Talia Limited | 3.3K | — | 13 |
| AS31474GB | MTV-UK-AS Viacom International Media Networks U.K. Limited | 3.3K | — | 12 |
| AS198328GB | TRAYPORT-AS Trayport Limited | 3.3K | 655.4K | 10 |
| AS44226GB | acturis-eu Acturis Ltd | 3.3K | — | 6 |
| AS52041GB | SCALEBLADE Scaleblade, Ltd. | 3.3K | 22 | 20 |
| AS48825GB | fast2host Fast4networks Ltd | 3.3K | 65.5K | 4 |
| AS203758GB | EUGameHost-LTD EUGAMEHOST LTD | 3.3K | — | 13 |
| AS44646GB | Gamesys-NET Gamesys Ltd. | 3.3K | — | 13 |
| AS21339GB | ContingencyNetworks Contingency Networks Ltd | 3.3K | — | 7 |
| AS51439GB | AIG-EUROPE-SERVICES-LTD AIG Europe (Services) Limited | 3.3K | 3 | 9 |
| AS50056GB | VORBOSS-ORIG Vorboss Limited | 3.3K | — | 13 |
| AS30933GB | PROTEXIA-EU KDA WEB SERVICES LTD | 3.3K | — | 6 |
| AS39458GB | REALHOSTS-AS Real Hosts Limited | 3.3K | 65.5K | 4 |
| AS44332GB | ASN-CENTRILOGIC-UK Centrilogic Ltd | 3.3K | 589.8K | 5 |
| AS29045GB | ITACTION IT Action Limited | 3.3K | — | 3 |