SCAN IP Question

In my understanding of SCAN each SCAN listener is running on a different node in the cluster.  How can I tell which node a specific SCAN IP is pointing to?  So for the IP's below how do I find out which node each is pointing to?

racle@pnjdsand6.bancroft.com:/prod/sys/paceoracle> nslookup pnjtestscan

Server:         172.31.160.100

Address:        172.31.160.100#53

Name:   pnjtestscan.bancroft.com

Address: 198.31.92.9

Name:   pnjtestscan.bancroft.com

Address: 198.31.92.8

Name:   pnjtestscan.bancroft.com

Address: 198.31.92.10