Is a2hosting.com or UltraDNS more popular?

UltraDNS is used by more websites in our catalog: 1,610 use a2hosting.com and 2,243 use UltraDNS.

Does a2hosting.com or UltraDNS have higher-authority sites?

UltraDNS sites have the higher median Ahrefs Domain Rating (a2hosting.com: 17, UltraDNS: 55).

Is a2hosting.com or UltraDNS growing faster?

Between 2026-06 and 2026-07, a2hosting.com went from 0.20% to 0.18% of all tracked sites, while UltraDNS went from 0.32% to 0.25%. a2hosting.com is gaining ground faster in our index.

Can a site use both a2hosting.com and UltraDNS?

No. A site runs a single DNS provider, so a2hosting.com and UltraDNS are mutually exclusive.

Where does this a2hosting.com vs UltraDNS data come from?

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.

a2hosting.com vs UltraDNS — Site Stats Database

a2hosting.com vs UltraDNS

A side-by-side comparison of two dns providers, based on the 840,922 DNS Provider sites tracked by Site Stats Database.

Last updated July 1, 2026

Metric	a2hosting.com	UltraDNS
Websites	1,610	2,243
Market share	0.19%	0.27%
Share of top 10K sites	0.01%	2.0%

Rank	#36	#27

Median DR	17	55

Average DR	19	50

Median keywords	782	2,426

Median referring domains	232	1,405

Median domain age	11 yrs	25 yrs

Average domain age	12 yrs	22 yrs

Average monthly traffic	14,335	1,414,555

Combined monthly traffic	23,080,064	3,172,847,481

freeworldmaps.net
LanguageEnglish
DR (Ahrefs)56
Total Keywords56,363
Referring Domains11,763
Domain Age21 yrs
Traffic (Jun 2026)1,246,094
Traffic Trend
Technologya2hosting.com
activecalculus.org
LanguageEnglish
DR (Ahrefs)38
Total Keywords5,767
Referring Domains537
Domain Age8 yrs
Traffic (Jun 2026)621,855
Traffic Trend
Technology
alice-in-wonderland.net
LanguageEnglish
DR (Ahrefs)54
Total Keywords9,091
Referring Domains3,455
Domain Age23 yrs
Traffic (Jun 2026)571,363
Traffic Trend
Technology
originalpancakehouse.com
LanguageEnglish
DR (Ahrefs)50
Total Keywords3,888
Referring Domains2,155
Domain Age27 yrs
Traffic (Jun 2026)529,552
Traffic Trend
Technology
pulgadas-a-cm.com
LanguageEnglish
DR (Ahrefs)4.7
Total Keywords3,831
Referring Domains78
Domain Age11 yrs
Traffic (Jun 2026)404,851
Traffic Trend
Technology
piedmontmastergardeners.org
LanguageEnglish
DR (Ahrefs)54
Total Keywords25,442
Referring Domains1,499
Domain Age19 yrs
Traffic (Jun 2026)361,602
Traffic Trend
Technology
filmjabber.com
LanguageEnglish
DR (Ahrefs)26
Total Keywords38,013
Referring Domains1,701
Domain Age19 yrs
Traffic (Jun 2026)356,821
Traffic Trend
Technology
horrorpress.com
LanguageEnglish
DR (Ahrefs)39
Total Keywords8,489
Referring Domains964
Domain Age4 yrs
Traffic (Jun 2026)349,888
Traffic Trend
Technology
everythingelsalvador.com
LanguageEnglish
DR (Ahrefs)12
Total Keywords1,580
Referring Domains132
Domain Age5 yrs
Traffic (Jun 2026)337,167
Traffic Trend
Technology
studiowildlife.com
LanguageEnglish
DR (Ahrefs)24
Total Keywords1,662
Referring Domains200
Domain Age6 yrs
Traffic (Jun 2026)327,953
Traffic Trend
Technology

Website	Language	DR (Ahrefs)	Total Keywords	Referring Domains	Domain Age	Traffic (Jun 2026)	Traffic Trend	Technology
freeworldmaps.net	English	56	56,363	11,763	21 yrs	1,246,094		a2hosting.com

rottentomatoes.com
LanguageEnglish
DR (Ahrefs)87
Total Keywords4,123,803
Referring Domains130,919
Domain Age27 yrs
Traffic (Jun 2026)626,896,769
Traffic Trend
TechnologyUltraDNS
walmart.com
LanguageEnglish
DR (Ahrefs)92
Total Keywords22,196,316
Referring Domains287,795
Domain Age31 yrs
Traffic (Jun 2026)430,824,067
Traffic Trend
Technology
nfl.com
LanguageEnglish
DR (Ahrefs)89
Total Keywords947,630
Referring Domains147,040
Domain Age30 yrs
Traffic (Jun 2026)275,712,888
Traffic Trend
TechnologyUltraDNS
fandango.com
LanguageEnglish
DR (Ahrefs)86
Total Keywords1,557,350
Referring Domains62,892
Domain Age30 yrs
Traffic (Jun 2026)98,286,895
Traffic Trend
Technology
kbb.com
Language
DR (Ahrefs)89
Total Keywords2,005,220
Referring Domains86,770
Domain Age30 yrs
Traffic (Jun 2026)84,995,643
Traffic Trend
TechnologyUltraDNS
ubereats.com
LanguageEnglish
DR (Ahrefs)92
Total Keywords3,826,446
Referring Domains71,403
Domain Age14 yrs
Traffic (Jun 2026)73,292,413
Traffic Trend
Technology
autotrader.com
Language
DR (Ahrefs)80
Total Keywords1,797,284
Referring Domains66,077
Domain Age31 yrs
Traffic (Jun 2026)54,644,605
Traffic Trend
Technology
history.com
LanguageEnglish
DR (Ahrefs)90
Total Keywords1,240,072
Referring Domains219,307
Domain Age31 yrs
Traffic (Jun 2026)49,147,241
Traffic Trend
Technology
toyota.com
LanguageEnglish
DR (Ahrefs)86
Total Keywords410,760
Referring Domains48,920
Domain Age31 yrs
Traffic (Jun 2026)37,296,227
Traffic Trend
Technology
delta.com
LanguageEnglish
DR (Ahrefs)87
Total Keywords357,010
Referring Domains59,298
Domain Age32 yrs
Traffic (Jun 2026)33,740,091
Traffic Trend
TechnologyUltraDNS