nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
The DOCTYPE is a required preamble for HTML5 websites.
These websites are related to kladrinfo.ru in terms of content, traffic and structure
md06n.ru
ks06q.ru
mybooke.net
kladr-online.ru
infokladr.ru
kod-oktmo.ru
indexp.ru
indexcod.ru