ac.uk vs co.uk

co.uk is used by more websites in our catalog: 164 use ac.uk and 2,705 use co.uk.

ac.uk sites have the higher median Ahrefs Domain Rating (ac.uk: 74, co.uk: 31).

Between 2026-06 and 2026-07, ac.uk went from 0.03% to 0.02% of all tracked sites, while co.uk went from 0.38% to 0.31%. ac.uk is gaining ground faster in our index.

No. A site runs a single DNS provider, so ac.uk and co.uk are mutually exclusive.

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.