Same As Parent Folder DNS A Record

When I ping our domain name, i get a response from a subnet (actually 3 subnets).  Yes, the network adddress 10.1.1.0 10.10.1.0 10.0.0.0.  There arent any devices on these addresses but the name is same as parent folder which is why I am worried to delete them.  I do an nslookup on our domain name, and I find the GC's mixed in with the 3 random network addresses.  There are no references to these addresses anywhere in the DNS folders but under the root domain folder with all of the a records.  SOA and NS only show the DC's as expected.  Thoughts? Are they safe to delete?

Thanks!