a2hosting.com vs ui-dns.biz

ui-dns.biz is used by more websites in our catalog: 1,610 use a2hosting.com and 1,827 use ui-dns.biz.

ui-dns.biz sites have the higher median Ahrefs Domain Rating (a2hosting.com: 17, ui-dns.biz: 22).

Between 2026-06 and 2026-07, a2hosting.com went from 0.20% to 0.18% of all tracked sites, while ui-dns.biz went from 0.23% to 0.21%. a2hosting.com is gaining ground faster in our index.

No. A site runs a single DNS provider, so a2hosting.com and ui-dns.biz 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.