dns-h.com vs UltraDNS

UltraDNS is used by more websites in our catalog: 163 use dns-h.com and 2,243 use UltraDNS.

UltraDNS sites have the higher median Ahrefs Domain Rating (dns-h.com: 22, UltraDNS: 55).

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

No. A site runs a single DNS provider, so dns-h.com 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.