Again I don't know sorry, but you might try pinging any URL's and see what comes up e.g.
ping
www.mappoint.net
mappoint.net [207.46.197.32]
ping staging.mappoint.net
findv3.staging.mappoint.net.nsatc.net [207.46.164.241]
I don't know if the router or firewall might have some table which would show addresses of recent traffic?
I was trying to think of the command-line tools (nbtstat, arp) that might show it at the client, but I think if you're behind a firewall they would not actually show what you want..
Eric