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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 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS42875GB | NCP-AS National Car Parks Limited | 256 | — | 1 |
| AS206987GB | MARCUSNAW Marcus Nawrocki | 256 | — | 1 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS206530GB | VOXYONDER VOXYONDER NETWORK SERVICES UK LTD | 256 | — | 1 |
| AS197166GB | GOTSCHNA-AS Gotschna Limited | 256 | 2 | 3 |
| AS215635GB | NUSO-AMS NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS207273GB | PHAROAH-AS Pharoah Tools Limited | 256 | — | 1 |
| AS50985GB | EA-UK-RUN Electronic Arts Limited | 256 | — | 1 |
| AS42330GB | UNCHAINEDISP Unchained ISP Limited | 256 | — | 1 |
| AS218513GB | STPD-NETWORK Joshua Noakes | 256 | 2 | 3 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS203133GB | Optimas_UK Optimas OE Solutions LTD | 256 | — | 1 |
| AS204539GB | AXIC-Axivora-Connect-Ltd Axivora Connect Ltd | 256 | 59 | 15 |
| AS200581GB | TFWFIBRE-ASN TfW Fibre Ltd | 256 | 524.3K | 2 |
| AS34693GB | CME-AS-LD4-1 CME Operations Limited | 256 | — | 1 |
| AS41988GB | TAKING-CARE-AS TAKING CARE PERSONAL ALARMS LIMITED | 256 | — | 1 |
| AS212031GB | BITSolutions-AS BIT Solutions Ltd | 256 | — | 1 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS216121GB | VALKYRIEHOSTING-AS Valkyrie Hosting LTD | 256 | — | 1 |
| AS218280GB | HILDREY-NET Stephen Hildrey | 256 | 1 | 2 |
| AS198063GB | DWIN-AS AWIN LTD | 256 | — | 1 |
| AS209540GB | EXPEDIA-DUBLIN Expedia.com Ltd. | 256 | — | 1 |
| AS44426GB | SYNECTICS-AS Synectics Solutions Ltd | 256 | — | 1 |
| AS28934GB | MIZUHO-AS Mizuho International Plc | 256 | — | 1 |
| AS206071GB | EA-DE-COLOGNE Electronic Arts Limited | 256 | — | 1 |
| AS202808GB | LOGIENET Blairlogie Community and Heritage Trust | 256 | — | 1 |
| AS197685GB | ONIONRING Onionring Limited | 256 | — | 1 |
| AS214566GB | Centerfield Centerfield Ltd | 256 | 260 | 6 |
| AS39576GB | Prostack-Hosting Sharpstack Hosting Ltd | 256 | 1 | 2 |
| AS215915GB | DEEPGREEN Deep Green Technologies Ltd | 256 | — | 1 |
| AS218344GB | AFX-2600 Oliver Ide | 256 | — | 1 |
| AS208563GB | LINUXGEMINI CodeReactor Limited | 256 | 256 | 2 |
| AS219172GB | VUNIFY VUNIFY LTD | 256 | — | 1 |
| AS44480GB | Brevan-Howard-AS Brevan Howard Asset Management LLP | 512 | — | 2 |
| AS50287GB | AudatexUK Audatex (UK) Ltd | 512 | 16 | 3 |
| AS34623GB | Netegral Astutium Limited | 512 | 1 | 2 |
| AS199285GB | CONARX Conarx, Ltd | 512 | 2 | 4 |
| AS210253GB | CREATIVE-NETWORK-CONSULTING-AS Creative Network Consulting Limited | 512 | — | 2 |
| AS218625GB | COMMUNICATION-DYNAMICS Communication Dynamics Ltd | 512 | — | 2 |
| AS216338GB | intelegro INTELEGRO LIMITED | 512 | — | 2 |
| AS202574GB | ASN-VLE VLE LIMITED | 512 | — | 2 |
| AS200008GB | PIRUM-AS Pirum Systems Limited | 512 | 524.3K | 3 |
| AS215162GB | TROOLI Trooli Ltd. | 512 | 512 | 4 |
| AS214314GB | CUSHWAKE-UK2 Cushman & Wakefield Debenham Tie Leung Limited | 512 | — | 2 |