HTTP response header

Header usage statistics

X-ac response header information and usage statistics.

Websites using header X-ac 79,149
Percentage of websites that use X-ac header 0.74%
Total discovered header values 70
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 957 websites
Top 1m sites 6,927 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.bur _bur 75.78%
3.bur _atomic_bur 9.17%
5.bur _atomic_bur 7.54%
5.bur _bur 2.22%
1.bur _bur 1.36%
2.bur _atomic_bur 1.06%
1.bur _atomic_bur 1.03%
4.bur _atomic_bur 0.83%
4.bur _bur 0.40%
3.sjc _atomic_bur 0.08%
2.bur _bur 0.06%
1.hhn _dfw 0.06%
1.sjc _atomic_bur 0.04%
3.sjc _bur 0.04%
2.sjc _atomic_bur 0.04%
1.sjc _bur 0.04%
3.bur _atomic_bur EXPIRED 0.02%
3.sea _atomic_bur 0.02%
4.sjc _atomic_bur 0.02%
3.dca _atomic_dca 0.02%