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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.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS5089GB | NTL Virgin Media Limited | 23M | 289 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.4M | 543 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET - Jisc Services Limited | 7M | 219 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.4M | 79 |
| 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 |
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.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS34623GB | Netegral Astutium Limited | 512 | 1 | 2 |
| AS203184GB | FNZ-EU FNZ HOLDINGS UK LIMITED | 512 | — | 2 |
| AS214199GB | luxxysystems Johnathan Hine | 512 | 2 | 4 |
| AS218774GB | UC-AS uno Ltd. | 512 | — | 1 |
| AS198863GB | CUP-AS Cambridge University Press (Holdings) Limited | 512 | — | 1 |
| AS211431GB | AndrewA Andrew Aubury | 512 | 369 | 11 |
| AS59803GB | cceip DATAQUEST (HEATHROW) LIMITED | 512 | — | 1 |
| AS212660GB | WHG-DXB1 WHG Hosting Services Ltd | 512 | — | 2 |
| AS214453GB | jandutech Beon Core Ltd | 512 | — | 2 |
| AS50632GB | NU-COLO-NET Fish.Net Limited | 512 | — | 1 |
| AS35106GB | MICROSOFT-LIVE-MEETING Microsoft Limited | 512 | 1 | 2 |
| AS204624GB | sycurio Sycurio Limited | 512 | — | 2 |
| AS197407GB | CUCE CHINA UNICOM (EUROPE) OPERATIONS LIMITED | 512 | — | 2 |
| AS33981GB | TSYS-AS Total System Services Processing Europe Limited | 512 | — | 2 |
| AS209710GB | LUMINE-AS SNRD NETWORKS LIMITED | 512 | 361 | 15 |
| AS41751GB | OCADO OCADO RETAIL LIMITED | 512 | — | 1 |
| AS215742GB | Duplia Duplia Ltd | 512 | 65.5K | 3 |
| AS210809GB | UniFlex UniFlex Systems Limited | 512 | — | 2 |
| AS214098GB | hrzn-hosting Horizon Hosting Limited | 512 | 3 | 5 |
| AS213287GB | Pure-IP-Europe-BV Pure IP Limited | 512 | — | 1 |
| AS25050GB | BACS-AS VOCALINK LTD | 512 | — | 1 |
| AS213549GB | SATISFYHOST SATISFYHOST LTD | 512 | 3 | 5 |
| AS216026GB | Smart-Technology-Advisers Smart Technology Advisers Ltd | 512 | — | 2 |
| AS58062GB | StarNetwork w1n ltd | 512 | 1 | 3 |
| AS35559GB | SOMEADDRESS Someaddress Networks Ltd | 512 | 2 | 2 |
| AS60654GB | METD-AS Metdesk Ltd | 512 | — | 2 |
| AS210282GB | FRONTIERDC-AS Frontier Technology Limited | 512 | — | 2 |
| AS43178GB | TECHNOLABS Technolabs Networks Ltd. | 512 | — | 1 |
| AS211189GB | ThermoFisher_EU Thermo Electron Ltd | 512 | — | 1 |
| AS49313GB | SEVAHOST-AS Seva-Host Ltd | 512 | — | 2 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS214315GB | CUSHWAKE-IRE Cushman & Wakefield Debenham Tie Leung Limited | 512 | — | 2 |
| AS197560GB | VDIS Beeks Financial Cloud Ltd | 512 | — | 2 |
| AS56335GB | NOCSULT Nocsult Ltd | 512 | — | 2 |
| AS214557GB | hostmenow HOSTMENOW LTD | 512 | — | 2 |
| AS51762GB | BDC-ADV-UK Adversor LLP | 512 | — | 2 |
| AS48611GB | CABLESTREET-AS Cablestreet Ltd | 512 | 131.1K | 4 |
| AS216274GB | uk-gigaloch Gigaloch Limited | 512 | 262.1K | 3 |
| AS207673GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS42053GB | STARLING Starling Bank Limited | 512 | — | 2 |
| AS51823GB | MTNETWORKSLTD Microtalk Europe Ltd | 512 | — | 2 |
| AS58102GB | TWODMEDIA 2Dmedia Ltd. | 512 | 1 | 2 |
| AS209765GB | AspireMedia ASPIRE MEDIA GROUP LIMITED | 512 | — | 2 |
| AS56644GB | SYNFS-AS Fundtech Financial Messaging Ltd | 512 | — | 2 |
| AS208176GB | HYVE-MANAGED-HOSTING Hyve Ltd | 512 | 4 | 4 |
| AS219469GB | PRIVATEBYTE-MNT PrivateByte Ltd | 512 | — | 2 |
| AS202416GB | DATALORDS Affiliate Squared Technologies Limited | 512 | 524.3K | 4 |
| AS204550GB | continental-ltd Continental Limited | 512 | 65.5K | 3 |
| AS50078GB | X-ON X-ON HEALTH LIMITED | 512 | — | 2 |
| AS212469GB | GREENCO-ISP ServerHouse Ltd | 512 | — | 1 |