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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 | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 512 |
| — |
| 2 |
| AS212660GB | WHG-DXB1 WHG Hosting Services Ltd | 512 | — | 2 |
| AS202297GB | SKYLON Skylon Solutions Limited | 512 | 65.5K | 7 |
| AS203795GB | uk-fidelis-1-as FIDELIS MARKETING LIMITED | 512 | — | 2 |
| AS49607GB | AdvancePayment ZEMPLER BANK LIMITED | 512 | — | 2 |
| AS212152GB | AS-Beazley Beazley Management Limited | 512 | — | 2 |
| AS214455GB | RETN-AE-AS RETN Limited | 512 | — | 1 |
| AS203184GB | FNZ-EU FNZ HOLDINGS UK LIMITED | 512 | — | 2 |
| AS197342GB | Aepona-BFS PERSISTENT SYSTEMS UK LIMITED | 512 | — | 2 |
| AS208176GB | HYVE-MANAGED-HOSTING Hyve Ltd | 512 | 4 | 4 |
| AS199262GB | TfL-FPS-AS Transport for London | 512 | — | 1 |
| AS207673GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS209260GB | SERVA-ONE-LTD SERVA ONE LTD | 512 | — | 2 |
| AS203128GB | NSML NEWCASTLE STRATEGIC SOLUTIONS LIMITED | 512 | — | 1 |
| AS202310GB | hyve-corp Hyve Ltd | 512 | 2 | 2 |
| AS204550GB | continental-ltd Continental Limited | 512 | 65.5K | 3 |
| AS56335GB | NOCSULT Nocsult Ltd | 512 | — | 2 |
| AS59619GB | Blackpool-AS Blackpool Borough Council | 512 | — | 2 |
| AS207900GB | uk_northrop_2 Northrop Grumman UK Limited | 512 | — | 2 |
| AS210924GB | SSDNetworks SSD Networks Limited | 512 | 524.3K | 3 |
| AS60688GB | CSPCORE CSP Partnership | 512 | — | 1 |
| AS204921GB | YunZheng-Network zhenyun sun | 512 | 23 | 10 |
| AS31659GB | Below-Zero Below Zero Hosting Ltd. | 512 | — | 2 |
| AS49401GB | BinkNet Bink Group Ltd | 512 | — | 1 |
| AS197407GB | CUCE CHINA UNICOM (EUROPE) OPERATIONS LIMITED | 512 | — | 2 |
| AS210415GB | ASVNK00056 LOBOS NETWORKING LTD | 512 | — | 2 |
| AS200008GB | PIRUM-AS Pirum Systems Limited | 512 | 524.3K | 3 |
| AS208915GB | HyperLink HYPERLXC MEDICAL LTD | 512 | 2 | 4 |
| AS212158GB | TransFICC TransFICC Ltd. | 512 | — | 2 |
| AS209413GB | DEDIK-CH DEDIK SERVICES LIMITED | 512 | — | 2 |
| AS47535GB | javelinbroadband JAVELIN BROADBAND LIMITED | 512 | — | 2 |
| AS59410GB | BARRITEC Barritel Ltd | 512 | 65.5K | 3 |
| AS205705GB | JDL-AS JDL Enterprises Limited | 512 | 2 | 4 |
| AS215662GB | KENSINGTON KENSINGTON MORTGAGE COMPANY LIMITED | 512 | — | 2 |
| AS204204GB | uk_point72uklimited Point72 UK Limited | 512 | — | 2 |
| AS213460GB | simplisticnodeus SIMPLE COMMUNICATIONS LIMITED | 512 | — | 2 |
| AS202610GB | NEKO-AS NekoClaw Ltd | 512 | 2 | 4 |
| AS51983GB | SARGASSO-DE-AS Sargasso N1 Limited | 512 | — | 1 |
| AS61978GB | IRIDIS York UK Hosting Ltd | 512 | 1 | 2 |
| AS41021GB | EBYR-HOWDEN-AS Ebuyer UK Limited | 512 | — | 1 |
| AS59724GB | REED-ELSEVIER-EMEA-GCC Elsevier Limited | 512 | — | 2 |
| AS43486GB | MSUI1-AS Mizuho Bank Ltd | 512 | — | 2 |
| AS204624GB | sycurio Sycurio Limited | 512 | — | 2 |
| AS48397GB | Unipart-AS Unipart Group Limited | 512 | — | 2 |
| AS48967GB | BATS_TRADING Cboe Europe Limited | 512 | — | 2 |
| AS212797GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS216307GB | HYPERHOST-AS Hyperhost Solutions Limited | 512 | 1 | 3 |