[~]$ netstat -atpn | grep 12345                                                                      
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:38586         127.0.0.1:12345         ESTABLISHED 1087/main       
tcp        0      0 127.0.0.1:38593         127.0.0.1:12345         ESTABLISHED 1087/main       
tcp        0      0 127.0.0.1:38591         127.0.0.1:12345         ESTABLISHED 1087/main       
tcp        0      0 127.0.0.1:38589         127.0.0.1:12345         ESTABLISHED 1087/main       
tcp        0      0 127.0.0.1:38590         127.0.0.1:12345         ESTABLISHED 1087/main       
tcp        0      0 127.0.0.1:38596         127.0.0.1:12345         ESTABLISHED 1087/main       
tcp        0      0 127.0.0.1:38595         127.0.0.1:12345         ESTABLISHED 1087/main       
tcp        0      0 127.0.0.1:38592         127.0.0.1:12345         ESTABLISHED 1087/main       
tcp        0      0 127.0.0.1:38594         127.0.0.1:12345         ESTABLISHED 1087/main       
tcp        0      0 127.0.0.1:38587         127.0.0.1:12345         ESTABLISHED 1087/main