Find Machine Name using an IP Address in Windows / Linux

C:\Users\Homer>nslookup 10.50.2.100
Server:  windc.ad.simpson.org
Address:  10.50.2.70
*** windc.ad.simpospn.org can't find 10.50.2.100: Non-existent domain

C:\Users\Homer>nbtstat -a 10.50.2.100
Local Area Connection:
Node IpAddress: [10.12.4.29] Scope Id: []
    Host not found.


MyLinux:/ # nslookup 10.50.2.100;
Server:         10.50.2.70
Address:        10.50.2.70#53
** server can't find 175.2.50.10.in-addr.arpa.: NXDOMAIN


MyLinux:/ # smbclient -L 10.50.2.100
Enter root's password: 
Connection to 10.50.2.100 failed (Error NT_STATUS_CONNECTION_REFUSED)


MyLinux:/ # host 10.50.2.100
Host 175.2.50.10.in-addr.arpa. not found: 3(NXDOMAIN)