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Sorry, we have no information about ws3.hostingnet.com. hostingnet.com is a domain controlled by two nameservers at hostingnet.com themselves. They are on different IP networks. Incoming mail for hostingnet.com is handled by one mailserver also at hostingnet.com. hostingnet.com has one IP number.

hostingnet.com
a records
 
+ 208.87.32.68 208.87.32.0/21 AS15146  
+ ---  
ns-soa records
ns1.hostingnet.com
+ 208.87.32.72 208.87.32.0/21 AS15146 web03.hostingnet.com
+ --- web03.hostingnet.com
ns records
ns1.hostingnet.com
+ 208.87.32.72 208.87.32.0/21 AS15146 web03.hostingnet.com
+ --- web03.hostingnet.com
ns2.hostingnet.com
+ 64.69.82.199 64.69.64.0/19 AS13768  
+ ---  
mx records
mx1.hostingnet.com
+ 216.187.103.165 216.187.96.0/21 AS13768  
+ ---  
ip numbers using ptr to this host
216.187.103.168