if-modified-since

HTTP response header

Header usage statistics

if-modified-since response header information and usage statistics.
Websites using header if-modified-since1,389
Percentage of websites that use if-modified-since header<0.1%
Total discovered header values1,130
Header uses directivesNo
Header values are unique or randomNo
Most popular in the country United States

if-modified-since Directives

if-modified-since directives value information and usage statistics
DirectiveShareWebsites countUnique Values

if-modified-since header usage distribution by website rank



Geographical Distribution

Header usage distribution by websites across the globe.



Websites utilizing if-modified-since

List of websites that use if-modified-since header
DomainCountryRankContacts
www.safetydetectives.com United States8,687
www.yachtworld.com United States55,431
azmvdnow.gov United States89,514
scorepass.com United States92,924
www.scorepass.com United States92,924
cs.scoregroup.com United States100,829
See full domain list

Common header values

List of top common if-modified-since header values
Header valueValue prevalence
must-revalidate4.68%
off1.37%
Mon, 15 Jan 2024 13:09:47 +00001.22%
Thu, 02 Dec 2010 00:46:40 GMT0.94%
Mon, 26 Jul 1997 05:00:00 GMT0.86%
Sat, 1 Jan 2005 00:00:00 GMT0.72%
2018-01-01 13:00:000.65%
Tue, 13 Feb 2024 03:52:08 +00000.65%
304 Not Modified0.58%
Fri, 21 Feb 2020 07:28:00 GMT0.50%
00.43%
Sun, 15 Jan 2023 07:28:00 GMT0.43%
Tue, 02 Apr 2024 00:00:00 GMT0.43%
Mon, 22 Jan 2008 00:00:00 GMT0.43%
Wed, 03 Apr 2024 00:00:00 GMT0.36%
Thu, 01 Jun 1970 00:00:00 GMT0.36%
Sun, 31 Mar 2024 00:00:00 GMT0.36%
Mon, 01 Apr 2024 00:00:00 GMT0.36%
Mon, 04 Dec 2023 00:00:00 GMT0.29%
Mon, 04 Mar 2024 00:32:10 CET0.29%