Where can I find the public NAT address

In GSX 3.2 I have an adapter setup with NAT.  The ip range it issues is 192.168.91.128-254 with a default gateway of 192.168.91.2 and a netmask of 255.255.255.0.  Typically NAT shares a public IP, however since this is a virtual machine, i'm not quite sure what HOST NIC it is using and how to forward incoming traffic to the NAT IP.