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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.
3,132 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 | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
| 256 |
| — |
| 1 |
| AS200709GB | Flotek-Shared-MNT Flotek Group Limited | 256 | — | 1 |
| AS198711GB | AS_MOVE_BITS_2 We Move Bits LTD | 256 | — | 1 |
| AS31632GB | OAG-AS OAG Aviation WorldWide Limited | 256 | — | 1 |
| AS43059GB | iitss IT Support Services Team Limited | 256 | 1 | 2 |
| AS199735GB | Inclusive-Bytes-CIC Inclusive Bytes C.I.C | 256 | 2 | 3 |
| AS42044GB | CENTRALNIC CentralNic Ltd | 256 | 1 | 2 |
| AS44617GB | HBK-London HBK EUROPE MANAGEMENT LLP | 256 | — | 1 |
| AS60079GB | EMF-AS Electromagnetic Field Ltd. | 256 | 1 | 2 |
| AS213000GB | ASAML Alliance Medical Limited | 256 | — | 1 |
| AS213493GB | NYRU NYRU Services Limited | 256 | — | 1 |
| AS198063GB | DWIN-AS AWIN LTD | 256 | — | 1 |
| AS214162GB | MERLIN Merlin Telecommunications Ltd | 256 | — | 1 |
| AS49372GB | Wichita-Inter-Konnects-1LL4H w1n ltd | 256 | — | 1 |
| AS197685GB | ONIONRING Onionring Limited | 256 | — | 1 |
| AS208150GB | uk-eagle Eagle Aquila Ltd | 256 | — | 1 |
| AS211049GB | DHSC-ARP Department of Health and Social Care | 256 | — | 1 |
| AS49967GB | MTVH THAMES VALLEY HOUSING ASSOCIATION LIMITED | 256 | — | 1 |
| AS60584GB | IN8INITY-AS IN8INITY GLOBAL LIMITED | 256 | — | 1 |
| AS52024GB | kwik-fit-gb KWIK-FIT (GB) Limited | 256 | — | 1 |
| AS59783GB | SBIX-DUS ONESAVINGS BANK PLC | 256 | — | 1 |
| AS216121GB | VALKYRIEHOSTING-AS Valkyrie Hosting LTD | 256 | — | 1 |
| AS210456GB | EastCostHosting EastCoastHost Ltd | 256 | — | 1 |
| AS199716GB | Bletchley-Networks-Limited Bletchley Networks Limited | 256 | — | 1 |
| AS44516GB | CTENET China Telecom Europe Ltd. | 256 | — | 1 |
| AS202306GB | HOSTGLOBALPLUS-AS HOSTGLOBAL.PLUS LTD | 256 | 17 | 3 |
| AS16303GB | Progressive IPSwitch Networks Ltd | 256 | — | 1 |
| AS35241GB | vostel Vostel Limited | 256 | — | 1 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | — | 1 |
| AS210005GB | easysoft Easysoft Ltd | 256 | — | 1 |
| AS211371GB | TELET Telet Research (N.I) Limited | 256 | — | 1 |
| AS201303GB | CentralNic-Anycast-F CentralNic Ltd | 256 | 1 | 2 |
| AS3252GB | FBRX-AS Fiberax Networking&Cloud Ltd | 256 | — | 1 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS214214GB | Threadneedle_MNT Threadneedle Asset Management Holdings Ltd | 256 | — | 1 |
| AS212868GB | GLITCH-SERVERS CHAPMAN Adam | 256 | 1 | 2 |
| AS215172GB | JIANYUELAB-AS JIANYUELAB LTD | 256 | 65.7K | 15 |
| AS59617GB | ANDYD Andy Davidson | 256 | 1 | 2 |
| AS203403GB | Flextel Flextel Limited | 256 | — | 1 |
| AS198892GB | MIXCLOUD-AS MIXCLOUD LTD | 256 | — | 1 |
| AS51303GB | Warsaw IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS215497GB | Tivarri Tivarri Limited | 256 | — | 1 |
| AS42046GB | ITN Independent Television News Limited | 256 | — | 1 |
| AS202808GB | LOGIENET Blairlogie Community and Heritage Trust | 256 | — | 1 |
| AS209765GB | AspireMedia ASPIRE MEDIA GROUP LIMITED | 512 | — | 2 |
| AS218774GB | UC-AS uno Ltd. | 512 | — | 1 |
| AS51222GB | CMC-MARKETS-PLC CMC MARKETS PLC | 512 | — | 2 |