get computer name based on ip

there are a lot of times when i go scanning a list of ips back and forth in search for its corresponding computer name. until i learned about the commands below which you can use to query a computer name based on its ip.

dos command:
# nbtstat -a x.x.x.x

linux command:
# nmblookup -A x.x.x.x

and it gives back the physical MAC address too! booyah!