BIND 9 not able to resolve few domains

[Borhade Ganesh (vMoksha)]

Dear All,
     I have configured Primary & Sec DNS with BIND 9.2.* on Solaris. I  have
found many times my DNS servers  ( Pri & Sec ) are not able to resolve few
Internet domains but these domains are able to resolve thru dnsstuff.com. I
have updated DNS cache file, kill -HUP <named>, restarted named,  but still
same problem persist.
    Any expert can help me to get root cause of it?


Best Regards
Ganesh BORHADE 
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