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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.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| Netquirk Netquirk Limited |
| 256 |
| — |
| 1 |
| AS214314GB | CUSHWAKE-UK2 Cushman & Wakefield Debenham Tie Leung Limited | 256 | — | 1 |
| AS215003GB | TUBES_AS Internet Tubes LTD | 256 | — | 1 |
| AS210988GB | LBHF London Borough Of Hammersmith & Fulham | 256 | — | 1 |
| AS51953GB | sciencegroup-uk Sagentia Ltd | 256 | — | 1 |
| AS209264GB | IVX Ivx Group Ltd | 256 | 1 | 2 |
| AS198789GB | AS_SPEEDY Speedy IP Services LTD | 256 | — | 1 |
| AS3206GB | AFB-AS AF Blakemore & Son Ltd | 256 | — | 1 |
| AS206573GB | Lonsys-uk London Systems UK Limited | 256 | — | 1 |
| AS16303GB | Progressive IPSwitch Networks Ltd | 256 | — | 1 |
| AS208755GB | NETWORKABLE Thomas Ferguson | 256 | 1 | 2 |
| AS214260GB | ITCommunications I.T Communications Limited | 256 | — | 1 |
| AS204539GB | AXIC-Axivora-Connect-Ltd Axivora Connect LtD | 256 | 77 | 18 |
| AS199716GB | Bletchley-Networks-Limited Bletchley Networks Limited | 256 | — | 1 |
| AS59783GB | SBIX-DUS ONESAVINGS BANK PLC | 256 | — | 1 |
| AS197106GB | TRPI-EU-AS T. Rowe Price International LTD | 256 | — | 1 |
| AS204387GB | EG-AS Evolution Gaming LTD | 256 | — | 1 |
| AS203094GB | ORG-CCL119-RIPE COMMUNITY CABLE LTD | 256 | — | 1 |
| AS215323GB | SGM SGM STUDIOS LTD | 256 | 16 | 17 |
| AS213185GB | ETA-AS Eta Heese | 256 | 1 | 2 |
| AS59904GB | LANCASHIRE_AS_RIPE LANCASHIRE INSURANCE SERVICES LTD | 256 | — | 1 |
| AS56723GB | EA-ES-OMBU Electronic Arts Limited | 256 | — | 1 |
| AS197320GB | NPA-AS National Pharmacy Association Ltd | 256 | — | 1 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 256 | 1 | 2 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS207549GB | AS207549 TheFinnaCompany Ltd | 256 | — | 1 |
| AS212868GB | GLITCH-SERVERS CHAPMAN Adam | 256 | 1 | 2 |
| AS206800GB | EA-SE-STOCKHOLM Electronic Arts Limited | 256 | — | 1 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS211198GB | WHITESPIDER WhiteSpider Enterprise Services Limited | 256 | — | 1 |
| AS211687GB | HCORE-LTD HCORE LTD | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS214162GB | MERLIN Merlin Telecommunications Ltd | 256 | — | 1 |
| AS214420GB | CLNEXUS Conor Lewis | 256 | 292 | 8 |
| AS207754GB | COLDERWOOD James Colderwood | 256 | 65.5K | 4 |
| AS211015GB | HO-LECN-DC02 UK Home Office (The Secretary of State for the Home Department) | 256 | — | 1 |
| AS59638GB | WITLTD Robert Mitchelmore | 256 | — | 1 |
| AS206033GB | REPOXLABS Repox Labs Ltd | 256 | 3 | 4 |
| AS209931GB | VirAir Virair Limited | 256 | — | 1 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS61427GB | SARGASSO-DC-AS Sargasso N1 Limited | 256 | — | 1 |
| AS29019GB | MORNINGSTAR-EUROPE Morningstar Europe Limited | 256 | — | 1 |
| AS210812GB | CHRIS-PRITCHARD Christopher Pritchard | 256 | 257 | 3 |
| AS12628GB | SCREAMING-NET-AS JACO ENGELBRECHT | 256 | 1 | 2 |
| AS216265GB | ARISTO-NET ARISTO NETWORKS LTD | 256 | 1 | 2 |
| AS48460GB | GREENCO-DR ServerHouse Ltd | 256 | — | 1 |
| AS198466GB | MORBY J. MORBY | 256 | — | 1 |