Trouble pinging computer name on network

The customer has a small and simple shared networking setup consisting of a few Win 10 Pro computers.  His computer out in the warehouse is named "Gin".  The Norton firewall is set up so his computer can be accessed.  If I go to a command prompt on that computer I can "ping gin" and get the expected responses.  I can also successfully ping the IP address of this computer as "ping 192.1687.254.21".

But if I go to any of the Win 10 Pro office computers I can ping the IP address of 192.168.254.21 successfully, but I cannot "ping gin".  When I try it, I get this response:

Pinging gin.Home [192.168.254.26]
Reply from 192.168.254.25: Destination host unreachable.

Why does it say "gin.Home"?  Why is it showing those addresses that end in .25 and .26 instead of the .21?  How can I "ping gin" like I need to?  TIA