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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
| 256 |
| 1 |
| 2 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS34625GB | OSHS-AS OSHS Ltd | 256 | — | 1 |
| AS20679GB | HSO Syntura Group Limited | 256 | 1 | 2 |
| AS206800GB | EA-SE-STOCKHOLM Electronic Arts Limited | 256 | — | 1 |
| AS209503GB | Zentyx Zentyx Limited | 256 | — | 1 |
| AS207960GB | AS-TRANSRIGHTS AS207960 Cyfyngedig | 256 | 7 | 8 |
| AS206479GB | AceRDP AceRDP Ltd | 256 | — | 1 |
| AS209931GB | VirAir Virair Limited | 256 | — | 1 |
| AS213798GB | POWELL-AS Jude Gabriel Powell | 256 | 285 | 16 |
| AS60339GB | H3GUK Hutchison 3G UK Limited | 256 | — | 1 |
| AS211667GB | CO3 COMPANY 3 STUDIOS UK LTD | 256 | — | 1 |
| AS44697GB | C3-UK Computer & Communication Co. Limited | 256 | — | 1 |
| AS60220GB | EA-UK-WIL Electronic Arts Limited | 256 | — | 1 |
| AS211067GB | LEC Eastbourne Borough Council | 256 | — | 1 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |
| AS211289GB | JOSH Joshua Leahy | 256 | 524.3K | 2 |
| AS197104GB | GENTOO-AS Gentoo Group Limited | 256 | — | 1 |
| AS28934GB | MIZUHO-AS Mizuho International Plc | 256 | — | 1 |
| AS199716GB | Bletchley-Networks-Limited Bletchley Networks Limited | 256 | — | 1 |
| AS214162GB | MERLIN Merlin Telecommunications Ltd | 256 | — | 1 |
| AS218666GB | CIVO-SANTACLARA Civo LTD | 256 | — | 1 |
| AS44355GB | COLOCATION Colocation Ltd | 256 | 257 | 3 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |
| AS203589GB | HOSTWEAVE-AS HOSTWEAVE LTD | 256 | — | 1 |
| AS218280GB | HILDREY-NET Stephen Hildrey | 256 | 1 | 2 |
| AS219172GB | VUNIFY VUNIFY LTD | 256 | — | 1 |
| AS209734GB | STARFALL STARFALL DISTRIBUTION LTD | 256 | — | 1 |
| AS211188GB | ASBTSLTD Business Teleports and Solutions Limited | 256 | — | 1 |
| AS200473GB | Samsung-MSK-AS Samsung SDS Europe Ltd | 256 | — | 1 |
| AS212195GB | nexstor-as Nexstor Ltd | 256 | — | 1 |
| AS202306GB | HOSTGLOBALPLUS-AS HOSTGLOBAL.PLUS LTD | 256 | 16 | 2 |
| AS212512GB | DETAI Detai Prosperous Technologies Limited | 256 | — | 1 |
| AS218543GB | EasyIX EasyIX Networks Limited | 256 | 1 | 2 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS203826GB | TRANQUILA-HOST-AS Tranquila-Host ltd. | 256 | — | 1 |
| AS43131GB | KAY-NET Kay Net (UK) Ltd | 256 | 16 | 2 |
| AS214451GB | R3ido101 Oliver Reid | 256 | 131.1K | 3 |
| AS211371GB | TELET Telet Research (N.I) Limited | 256 | — | 1 |
| AS198219GB | CHARLIE-AS Charlie Camilleri | 256 | 10 | 4 |
| AS198337GB | DATAART-LVIV DataArt Technologies UK Ltd | 256 | — | 1 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS200468GB | ALVAREZ ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP | 256 | — | 1 |
| AS204776GB | Mintopia Jessica Smith | 256 | 257 | 3 |
| AS35241GB | vostel Vostel Limited | 256 | — | 1 |
| AS39717GB | POLESTAR-AS Polestar Ltd | 256 | — | 1 |
| AS207089GB | uk-itsystems IT Systems & Support Limited | 256 | 524.3K | 2 |