The default name resolution order is DNS, followed by NetBT.

If you wish NetBT to have priority over DNS, use Regedt32 to navigate to:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

On the Edit menu, Add Value name DnsNbtLookupOrder, as a type REG_DWORD, and set the data value to 1. The default is 0.

You must restart your computer for this change to become effective.