NSLookup returns UnKnown for server, but returns proper lookup record

Hello everyone,

I'm wondering what can cause this.. it must be a DNS issue.. I'm assuming this has to do with recursion.. Any advice or help would be great. Thanks technet!

C:\Users\eguerrero>nslookup 172.16.10.58
Server:  UnKnown
Address:  172.16.10.210

Name:    fs1.dttla.com
Address:  172.16.10.58

C:\Users\eguerrero>nslookup 172.16.10.58
Server:  UnKnown
Address:  172.16.10.210

Name:    fs1.dttla.com
Address:  172.16.10.58