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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 |
| — |
| 1 |
| AS50224GB | AS50224 MTRL GROUP LIMITED | 256 | — | 1 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS213493GB | NYRU NYRU Services Limited | 256 | — | 1 |
| AS61283GB | MILLAR Andrew Millar Ltd | 256 | 1 | 2 |
| AS197685GB | ONIONRING Onionring Limited | 256 | — | 1 |
| AS47935GB | QUANTUMUK-AS Quantum Communications Ltd | 256 | 65.5K | 2 |
| AS218713GB | NETCENSUS-AS NETCENSUS LTD | 256 | 1 | 2 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS48460GB | GREENCO-DR ServerHouse Ltd | 256 | — | 1 |
| AS48686GB | SOLTECH-ASN oRe Networks Limited | 256 | 1 | 2 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS211049GB | DHSC-ARP Department of Health and Social Care | 256 | — | 1 |
| AS210192GB | TOPLINESYSTEMS Topline Systems Ltd | 256 | — | 1 |
| AS211374GB | McLarenApplied Motion Applied Limited | 256 | — | 1 |
| AS218807GB | Pixel-Networks Timothy Glover | 256 | 1 | 2 |
| AS208150GB | uk-eagle Eagle Aquila Ltd | 256 | — | 1 |
| AS49781GB | b4rk Broadband for Rural Kent Ltd | 256 | — | 1 |
| AS41553GB | Reed-Managed-Services Reed Specialist Recruitment Limited | 256 | — | 1 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 256 | 1 | 2 |
| AS197213GB | NINETY-ONE-TELECOM 91TELECOM LTD | 256 | 17 | 3 |
| AS201528GB | ORCHID-CELLMARK-CHORLEY Orchid Cellmark Ltd | 256 | 1 | 2 |
| AS214731GB | ETO-AS ETO Networks Limited | 256 | 633 | 44 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |
| AS211198GB | WHITESPIDER WhiteSpider Enterprise Services Limited | 256 | — | 1 |
| AS206071GB | EA-DE-COLOGNE Electronic Arts Limited | 256 | — | 1 |
| AS42046GB | ITN Independent Television News Limited | 256 | — | 1 |
| AS51047GB | TURTLE-NET Turtle Networks Ltd | 256 | — | 1 |
| AS200027GB | RDA-TELECOM RDA GROUP LIMITED | 256 | 1 | 2 |
| AS205615GB | SSC SS&C Solution Limited | 256 | — | 1 |
| AS215551GB | Sweden_Internet_Exchange KeFF Networks Ltd | 256 | — | 1 |
| AS200468GB | ALVAREZ ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP | 256 | — | 1 |
| AS49606GB | MCDEU01 MCD Europe Limited | 256 | — | 1 |
| AS209215GB | Moe-Network-LTD Moe Network Ltd | 256 | 16 | 2 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS214064GB | Kevin-Titmarsh Kevin Titmarsh | 256 | 1 | 2 |
| AS213646GB | monkey-tree-hosting Monkey Tree Hosting Limited | 256 | 131.1K | 3 |
| AS214566GB | Centerfield Centerfield Ltd | 256 | 257 | 3 |
| AS215303GB | Qubitbytes Qubitbytes LTD | 256 | — | 1 |
| AS41380GB | ALD-AS Ald Automotive Ltd | 256 | — | 1 |
| AS39459GB | PGL-AS Office Unlocked Limited | 256 | — | 1 |
| AS216036GB | TOTALCOMMS-AS Signal Telecom Ltd | 256 | — | 1 |
| AS204519GB | KORPTRADE-AS SL029315 LP | 256 | — | 1 |
| AS202939GB | CHIMON-NETWORK Chimon Technology Ltd | 256 | 849 | 22 |
| AS202288GB | MM Matthew Martin | 256 | 1 | 2 |
| AS198789GB | AS_SPEEDY Speedy IP Services LTD | 256 | — | 1 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |