Just like DNS, the NTB-NS (NetBIOS name service) protocol is used to translate names to IP addresses. By default, it's used as a fallback in AD-DS.

The tools nbtscan and nmblookup can be used for reverse lookup (IP addresses to NetBIOS names)

# Name lookup on a range
nbtscan -r $SUBNET/$MASK

# Find names and workgroup from an IP address
nmblookup -A $IPAdress

Some NBT-NS recon can be carried out with the enum4linux tool (see this page).

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