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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 |
| 512 |
| — |
| 2 |
| AS198652GB | SELECTEL-AS Selectel LTD | 512 | — | 2 |
| AS218761GB | EXPERIAN_LD5_LD8 Experian International Unlimited | 512 | — | 2 |
| AS212601GB | Calastone Calastone Limited | 512 | — | 2 |
| AS39150GB | HOSTING-TELECOM-AS HOSTING TELECOM LTD | 512 | 327.7K | 7 |
| AS204624GB | sycurio Sycurio Limited | 512 | — | 2 |
| AS62364GB | PLYMOUTH-CITY-COUNCIL Plymouth City Council | 512 | — | 2 |
| AS200623GB | NetBlazer-Ltd NetBlazer Ltd | 512 | 2 | 4 |
| AS198032GB | UCLES-AS Cambridge Assessment | 512 | — | 2 |
| AS51087GB | BLING-AS Bling Network Ltd | 512 | 1.1K | 23 |
| AS212660GB | WHG-DXB1 WHG Hosting Services Ltd | 512 | — | 2 |
| AS201301GB | soundmouse-netwise Soundmouse Ltd | 512 | 131.1K | 4 |
| AS208176GB | HYVE-MANAGED-HOSTING Hyve Ltd | 512 | 4 | 4 |
| AS202574GB | ASN-VLE VLE LIMITED | 512 | — | 2 |
| AS43851GB | LWBNET Etheroute Ltd | 512 | 1 | 3 |
| AS200105GB | JUNGLELABS JUNGLELABS LTD | 512 | 12 | 14 |
| AS49401GB | BinkNet Bink Group Ltd | 512 | — | 1 |
| AS203064GB | PURPLECOMPUTING-AS Purple Computing Limited | 512 | — | 1 |
| AS33975GB | NETCONSULT-AS NetConsult Ltd | 512 | — | 1 |
| AS208417GB | EONSCOPE SECUREEND LTD | 512 | — | 2 |
| AS5586GB | MCI-INT Verizon UK Limited | 512 | 32 | 3 |
| AS203128GB | NSML NEWCASTLE STRATEGIC SOLUTIONS LIMITED | 512 | — | 1 |
| AS199948GB | EXPANSE-NETWORKS Cosmorack Ltd | 512 | 1 | 3 |
| AS206924GB | BENJOJONET Ben Cartwright-Cox | 512 | 9 | 11 |
| AS201478GB | REDI_TECH Refinitiv Limited | 512 | — | 2 |
| AS41367GB | PSN-AS Wood Group UK Limited | 512 | — | 2 |
| AS202610GB | NEKO-AS NekoClaw Ltd | 512 | 65 | 4 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS202067GB | advantex Advantex Network Solutions Ltd | 512 | — | 2 |
| AS31659GB | Below-Zero Below Zero Hosting Ltd. | 512 | — | 2 |
| AS203728GB | AS_BAHU BAHU LTD | 512 | 1 | 3 |
| AS198863GB | CUP-AS Cambridge University Press (Holdings) Limited | 512 | — | 1 |
| AS57740GB | HERMES-DATACOMMS Hermes Datacommunications International Limited | 512 | — | 2 |
| AS206166GB | SCHRODERS-UK-AS Schroder Investment Management Limited | 512 | — | 2 |
| AS216307GB | HYPERHOST-AS Hyperhost Solutions Limited | 512 | 1 | 3 |
| AS28715GB | BrassHornComms Brass Horn Communications | 512 | 8.2K | 4 |
| AS43669GB | ACSL2 Axia Computer Systems Limited | 512 | — | 2 |
| AS198685GB | LUNAR-AS LUNAR HOSTING LTD | 512 | — | 2 |
| AS210404GB | TUNSTALL-UK Tunstall Healthcare (UK) Limited | 512 | — | 2 |
| AS207194GB | TOTALCOMPUTERS Total Computer Services Ltd | 512 | — | 2 |
| AS34930GB | HAL LHR AIRPORTS LIMITED | 512 | — | 2 |
| AS58102GB | TWODMEDIA 2Dmedia Ltd. | 512 | 1 | 2 |
| AS209765GB | AspireMedia ASPIRE MEDIA GROUP LIMITED | 512 | — | 2 |
| AS214315GB | CUSHWAKE-IRE Cushman & Wakefield Debenham Tie Leung Limited | 512 | — | 2 |
| AS214455GB | RETN-AE-AS RETN Limited | 512 | — | 1 |
| AS215320GB | AlncomAS2 ALNWICK COMPUTERWARE LTD. | 512 | 131.1K | 3 |
| AS33981GB | TSYS-AS Total System Services Processing Europe Limited | 512 | — | 2 |