DNS issue when www in URL does not work

Oct 2013 Blogger forum "post":https://productforums.google.com/forum/#!category-topic/blogger/something-is-broken/CU8vQEvhmZw :

http://blogging.nitecruzr.net/2008/10/diagnosing-problems-with-custom-domains.html

http://www.digwebinterface.com/?hostnames=coriandergirl.com%0D%0Awww.coriandergirl.com&type=A&useresolver=8.8.4.4&ns=auth&nameservers=

http://blogging.nitecruzr.net/2012/04/simplicity-of-custom-domain-setup.html

http://blogging.nitecruzr.net/2013/06/custom-domain-instability-caused-by.html

#dns