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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 |
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| AS219018GB | gb-ducky Droidhub LTD | — | 1 | 1 |
| AS218576GB | ANSORA-AS ANSORA TECHNOLOGIES LTD | — | — | 0 |
| AS9786GB | XIANDOUCLOUD1-AS-AP - XIANDOUCLOUD INFORMATION TECHNOLOGY LTD | — | 1 | 1 |
| AS202459GB | CUSHWAKE-UK Cushman & Wakefield Debenham Tie Leung Limited | — | — | 0 |
| AS200800GB | ZURGANF-AS Zurganf Ltd | — | 1 | 1 |
| AS208335GB | HOSTBYTE Connor Goodall trading as HostByte | — | — | 0 |
| AS218671GB | WALKOWSKI-AS Lukasz Walkowski | — | 1 | 1 |
| AS202695GB | MODERN-UK Modern Networks Services Ltd | — | — | 0 |
| AS56758GB | CR0BAR Cr0bar Limited | — | 6 | 6 |
| AS218839GB | ZONEKTELECOM-AS ZONEK TELECOM LTD | — | 10 | 10 |
| AS213982GB | DISTRICTB-AS Callum Bennett | — | 17 | 2 |
| AS42173GB | Yahoo-Switzerland Yahoo-UK Limited | — | — | 0 |
| AS209606GB | BEYONDORBIT Beyond Orbit Ltd. | — | 3 | 3 |
| AS61024GB | ISP-BACKBONE-LTD Cloud Unboxed Limited | — | — | 0 |
| AS215768GB | Infected-Systems Alex Haydock | — | 1 | 1 |
| AS49819GB | SHOPZILLAEU Skimbit Ltd | — | — | 0 |
| AS57110GB | AARAN-CLOUD-AS Aaran Perry | — | 257 | 2 |
| AS43551GB | AMT AMT DataTechnologies Limited | — | — | 0 |
| AS202751GB | BGP_AS Christopher Edwards | — | 5 | 5 |
| AS218726GB | Bym-Networks BYM SYSTEMS LTD | — | — | 0 |
| AS215332GB | SNIFF122-AS Lewis Foster | — | 1 | 1 |
| AS148971GB | KEIBIIN-AS-AP - Keibiin's Holdings Limited | — | 313 | 13 |
| AS218940GB | KUMO2 Tealight Ltd | — | 1 | 1 |
| AS199875GB | EA-ES-MAD Electronic Arts Limited | — | — | 0 |
| AS219370GB | Johnson Benjamin Johnson | — | 22 | 7 |
| AS59621GB | FloNetworks-AS Flo Networks Limited | — | — | 0 |
| AS215022GB | FWLB-networks Jamie Hosker | — | 1 | 1 |
| AS210338GB | PIXSAL-AS Kieran Breeze | — | 3 | 3 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS43251GB | SURFCONTROL-READING Forcepoint Overseas Limited | — | — | 0 |
| AS29478GB | JUNESTA Karl Dyson | — | 2 | 2 |
| AS44366GB | DATACASH-AS MASTERCARD PAYMENT GATEWAY SERVICES GROUP LIMITED | — | — | 0 |
| AS219361GB | SHIKANOKO-NETWORKS SHIKANOKO NETWORKS LTD | — | 1 | 1 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS209601GB | XiaoYuanNET XiaoYuan Networks Limited | — | 6 | 6 |
| AS50697GB | ACSN-AS Reliance Cyber Ltd | — | — | 0 |
| AS208485GB | PINHOUSE-AS PINHOUSE LIMITED | — | 1 | 1 |
| AS15635GB | YAHOO-UKL Yahoo-UK Limited | — | — | 0 |
| AS200279GB | DOUWES-NET Thomas Douwes | — | 5 | 5 |
| AS25041GB | AWS-DX British Telecommunications Limited | — | — | 0 |
| AS212806GB | stratagem VeloxServ Communications Ltd | — | 64 | 1 |
| AS2529GB | DEMON-INTERNET - IDDQD-AS | — | — | 0 |
| AS218294GB | MERIDIAN-BACKBONE Brian Henry | — | 1 | 1 |
| AS34202GB | CLOUVIDER-THN2 Clouvider Limited | — | 1 | 1 |
| AS213543GB | JONES-LAB Alexander Jones | — | 1 | 1 |
| AS133479GB | KEYLOOP-AS-AP - Keyloop (UK) Limited | — | — | 0 |