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Help with DNS Statis entry ending in 0 (

Last Modified: 2016-07-18
I'm a not a network guy but trying to get up to speed with our DNS configuration on this Windows 2008 R2 server..  In the image below I have received advice that the static entry is not required and in fact can cause problems.  Is this correct?  What does this entry indicated?

Also, the record above ( is not known to use and does not respond to pings.  Given it was last updated in 2015 I'm considering deleting it.   Shouldn't these records expire automatically?
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