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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 | 331 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 256 |
| 524.3K |
| 2 |
| AS200709GB | Flotek-Shared-MNT Flotek Group Limited | 256 | — | 1 |
| AS206512GB | TIGOVA TIGOVA NETWORK LIMITED | 256 | — | 1 |
| AS58007GB | Witine Witine Limited | 256 | — | 1 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS41612GB | REDBEE-AS Red Bee Media Limited | 256 | — | 1 |
| AS48706GB | EDP KERRIDGE COMMERCIAL SYSTEMS (KSH) LIMITED | 256 | — | 1 |
| AS47988GB | PHOTOSOFPICKLES Charles Allom | 256 | 1 | 2 |
| AS214634GB | AS-BRESSENDEN Bressenden Associates Ltd | 256 | 1 | 2 |
| AS197284GB | K3X-MNT K3X SYSTEMS Ltd | 256 | 1 | 2 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS209870GB | Cylo Cylo Ltd | 256 | — | 1 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS198243GB | GlobalEntry-AS GLOBAL ENTRY SOLUTIONS LTD | 256 | — | 1 |
| AS49606GB | MCDEU01 MCD Europe Limited | 256 | — | 1 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS202141GB | HALLHOST-AS Warren Hall | 256 | — | 1 |
| AS49781GB | b4rk Broadband for Rural Kent Ltd | 256 | — | 1 |
| AS199649GB | KTSTECH-AS KTS Technology Group Limited | 256 | 1 | 2 |
| AS210549GB | CDW-IT-INFRA CDW Ltd | 256 | — | 1 |
| AS60079GB | EMF-AS Electromagnetic Field Ltd. | 256 | 1 | 2 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS12628GB | SCREAMING-NET-AS JACO ENGELBRECHT | 256 | 1 | 2 |
| AS60339GB | H3GUK Hutchison 3G UK Limited | 256 | — | 1 |
| AS47367GB | TORBAY-AS Torbay Economic Development Company Limited | 256 | — | 1 |
| AS200473GB | Samsung-MSK-AS Samsung SDS Europe Ltd | 256 | — | 1 |
| AS39715GB | platinumhedgehog PLATINUM HEDGEHOG CONSULTANCY LIMITED | 256 | — | 1 |
| AS215003GB | TUBES_AS Internet Tubes LTD | 256 | — | 1 |
| AS213546GB | AS_QUICK_BYTES Quick Bytes LTD | 256 | — | 1 |
| AS202587GB | UMOJA-AS C2C Ltd | 256 | — | 1 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS31632GB | OAG-AS OAG Aviation WorldWide Limited | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS206773GB | MSXI MSX International Ltd | 256 | — | 1 |
| AS208590GB | AVE-AS Lasagna Ltd | 256 | 65.5K | 2 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS56739GB | DICO PRT Systems Limited | 256 | — | 1 |
| AS208723GB | VDX-SYSTEMS VDX SYSTEMS LTD | 256 | 4 | 5 |
| AS207273GB | PHAROAH-AS Pharoah Tools Limited | 256 | — | 1 |
| AS44782GB | UK-FOREX-AS Stratos Markets Limited | 256 | — | 1 |
| AS215008GB | E-VOLVE e-volve Solutions Ltd | 256 | 524.3K | 2 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS215551GB | Sweden_Internet_Exchange KeFF Networks Ltd | 256 | — | 1 |
| AS200304GB | Everyday-Communications Everyday Communications LTD | 256 | — | 1 |
| AS211829GB | Zaha ZAHA HADID LIMITED | 256 | — | 1 |