ac.uk vs UltraDNS

UltraDNS is used by more websites in our catalog: 164 use ac.uk and 2,243 use UltraDNS.

ac.uk sites have the higher median Ahrefs Domain Rating (ac.uk: 74, UltraDNS: 55).

Between 2026-06 and 2026-07, ac.uk went from 0.03% to 0.02% of all tracked sites, while UltraDNS went from 0.32% to 0.25%. ac.uk is gaining ground faster in our index.

No. A site runs a single DNS provider, so ac.uk and UltraDNS 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.