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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 |
|---|---|---|---|---|
| AS198466GB | MORBY J. MORBY | 256 | — | 1 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS44782GB | UK-FOREX-AS Stratos Markets Limited | 256 | — | 1 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS21464GB | EDF-AS EDF Trading Ltd | 256 | — | 1 |
| AS207925GB | SQUIRREL-HQ Squirrel Internet Ltd | 256 | 131.1K | 3 |
| AS198231GB | SIXNET Sixnet Operation Ltd | 256 | — | 1 |
| AS197284GB | K3X-MNT K3X SYSTEMS Ltd | 256 | 1 | 2 |
| AS210938GB | whitbread Whitbread Group PLC | 256 | — | 1 |
| AS215187GB | PROMISED God Promised Me Networks LTD | 256 | — | 1 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS206981GB | TeritumDevelopment Christopher Mountford | 256 | 1 | 2 |
| AS204293GB | TinyHomeLab TinyHomeLab Ltd | 256 | 1 | 2 |
| AS204757GB | ReactiveMarkets Reactive Markets Limited | 256 | — | 1 |
| AS210584GB | PwCITSCo PricewaterhouseCoopers IT Services Limited | 256 | — | 1 |
| AS206773GB | MSXI MSX International Ltd | 256 | — | 1 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS47935GB | QUANTUMUK-AS Quantum Communications Ltd | 256 | 65.5K | 2 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS211855GB | FRAMES In The Frame (Manchester) Ltd | 256 | — | 1 |
| AS198892GB | MIXCLOUD-AS MIXCLOUD LTD | 256 | — | 1 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |
| AS206800GB | EA-SE-STOCKHOLM Electronic Arts Limited | 256 | — | 1 |
| AS206457GB | EA-IE-GALWAY Electronic Arts Limited | 256 | — | 1 |
| AS218807GB | Pixel-Networks Timothy Glover | 256 | 1 | 2 |
| AS218950GB | VYTAL VYTAL TECHNOLOGY LTD | 256 | — | 1 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS219185GB | NARWHAL-NETTECH NARWHAL NETTECH LIMITED | 256 | 3 | 4 |
| AS203108GB | iTouchVision iTouch Vision LTD | 256 | — | 1 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS200425GB | BG-TAL Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS197106GB | TRPI-EU-AS T. Rowe Price International LTD | 256 | — | 1 |
| AS211188GB | ASBTSLTD Business Teleports and Solutions Limited | 256 | — | 1 |
| AS205237GB | SAVILLS-PLC SAVILLS PLC | 256 | — | 1 |
| AS48706GB | EDP KERRIDGE COMMERCIAL SYSTEMS (KSH) LIMITED | 256 | — | 1 |
| AS28934GB | MIZUHO-AS Mizuho International Plc | 256 | — | 1 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | — | 1 |
| AS204778GB | PaulLewis Paul Nicholas Lewis | 256 | 1 | 2 |
| AS49209GB | CTE-ASN China Telecom Europe Ltd. | 256 | — | 1 |
| AS60079GB | EMF-AS Electromagnetic Field Ltd. | 256 | 1 | 2 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |
| AS213755GB | LUNORY-AS LUNORY CLOUD SOLUTIONS LTD | 256 | — | 1 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS200473GB | Samsung-MSK-AS Samsung SDS Europe Ltd | 256 | — | 1 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |