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Hello All, I have oracle 12c DB installed on my localhost (local laptop) and able to connect to DB through sqldeveloper with hostname as "localhost" or ip as "127.0.0.1". However when I tried to connect to this DB through hostname (example, "XYZ-IN.in.oracle.com") , I am hetting below error: I need to connect to a DB in my local laptop through another server in same network. So that time I will need to give hostname "XYZ-IN.in.oracle.com" at TNS ora file of that server and hosts file of that server. Hence wanted to check if I can connect with hostname "XYZ-IN.in.oracle.com" localy first before updating tnsora file and hosts file at server. This alias for localhost , I got from "ipconfig /all " command at command line so I believe it is correct name only. However one observation- when I do "ping localhost" or "ping 127.0.0.1", I get proper respoonse like below: however if I do "ping XYZ-IN.in.oracle.com" then response is like below: Is that mean- localhost alias "XYZ-IN.in.oracle.com" is not correct? But that is the only alias I got from "ipconfig /all" command: Kindly advise. Thanks, Rajneesh