HTTP response header

Header usage statistics

X-ac response header information and usage statistics.

Websites using header X-ac 449,964
Percentage of websites that use X-ac header 0.84%
Total discovered header values 107
Header uses directives No
Header values are unique or random No
Most popular in the country United States of America

Distribution by websites popularity

X-ac detection in the top websites by popularity

Top 10k sites 59 websites
Top 100k sites 950 websites
Top 1m sites 6,898 websites

Websites utilizing X-ac

List of websites that use X-ac header

Domain Country Rank Contacts
wordpress.com United States of America 32
wp.me United States of America 51
automattic.com United States of America 649
washingtoncitypaper.com United States of America 877
bangordailynews.com United States of America 895
en.blog.wordpress.com United States of America 1,096
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Geographical Distribution

Header usage distribution by websites across the globe.

Common header values

List of top common X-ac header values

Header value Value prevalence
3.sea _bur 38.08%
3.bur _bur 30.88%
5.bur _bur 9.71%
1.bur _bur 9.36%
3.sea _atomic_bur 5.38%
3.bur _atomic_bur 2.33%
5.bur _atomic_bur 1.88%
1.sea _bur 0.55%
1.sea _atomic_bur 0.28%
2.sea _atomic_bur 0.26%
2.bur _atomic_bur 0.25%
4.sea _atomic_bur 0.24%
1.bur _atomic_bur 0.23%
4.bur _atomic_bur 0.21%
1.hhn _dfw 0.17%
2.bur _bur 0.04%
4.sea _bur 0.03%
2.hhn _dfw 0.02%
2.sea _bur 0.01%
4.bur _bur 0.01%