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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.
3,134 autonomous systems registered to United Kingdom. Click an AS for detail.
| 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 | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
| 256 |
| 524.3K |
| 2 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS206457GB | EA-IE-GALWAY Electronic Arts Limited | 256 | — | 1 |
| AS207536GB | SEABECKSOLUTIONS-AS SEABECK SOLUTIONS LIMITED | 256 | — | 1 |
| AS198222GB | WHC-AS West Herts College | 256 | — | 1 |
| AS203403GB | Flextel Flextel Limited | 256 | — | 1 |
| AS209340GB | TIG-Network-EU1 TIG Management Services Limited | 256 | — | 1 |
| AS219236GB | WGL Wolf Girls Limited | 256 | 1 | 2 |
| AS203826GB | TRANQUILA-HOST-AS Tranquila-Host ltd. | 256 | — | 1 |
| AS47744GB | ANNECTO-AS XTEND SOLUTIONS LTD | 256 | — | 1 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |
| AS51047GB | TURTLE-NET Turtle Networks Ltd | 256 | — | 1 |
| AS197106GB | TRPI-EU-AS T. Rowe Price International LTD | 256 | — | 1 |
| AS215172GB | JIANYUELAB-AS JIANYUELAB LTD | 256 | 65.7K | 15 |
| AS211165GB | asbattyhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS39459GB | PGL-AS Office Unlocked Limited | 256 | — | 1 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS12628GB | SCREAMING-NET-AS JACO ENGELBRECHT | 256 | 1 | 2 |
| AS60758GB | DMC-AS Deluxe UK Holdings Limited | 256 | — | 1 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |
| AS47426GB | ADVITEL-AS Advitel Ltd | 256 | 1 | 2 |
| AS206981GB | TeritumDevelopment Christopher Mountford | 256 | 1 | 2 |
| AS56739GB | DICO PRT Systems Limited | 256 | — | 1 |
| AS212880GB | AS-LLTN-RIPE Rydal Communications Ltd | 256 | — | 1 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |
| AS218950GB | VYTAL VYTAL TECHNOLOGY LTD | 256 | — | 1 |
| AS215303GB | Qubitbytes Qubitbytes LTD | 256 | — | 1 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 256 | 1 | 2 |
| AS215252GB | LANTEC-AS Lantec Services Ltd | 256 | 1 | 2 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS34900GB | CME-AS-LO2-2 CME Operations Limited | 256 | — | 1 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS219522GB | PUP Pupnet LTD | 256 | 1 | 2 |
| AS206800GB | EA-SE-STOCKHOLM Electronic Arts Limited | 256 | — | 1 |
| AS49728GB | HEREFORDSHIRE-COUNCIL Herefordshire Council | 256 | — | 1 |
| AS205011GB | celertechuk Celer Technologies Limited | 256 | — | 1 |
| AS209215GB | Moe-Network-LTD Moe Network Ltd | 256 | 16 | 2 |
| AS219094GB | MCDADE William McDade | 256 | 2 | 3 |
| AS51303GB | Warsaw IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS49793GB | IAIN-MCWILLIAMS-AS LMP Technical Services Ltd | 256 | 1 | 2 |
| AS209503GB | Zentyx Zentyx Limited | 256 | 1 | 2 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS216036GB | TOTALCOMMS-AS Signal Telecom Ltd | 256 | — | 1 |
| AS199735GB | Inclusive-Bytes-CIC Inclusive Bytes C.I.C | 256 | 2 | 3 |