Mac find process listening to port

$ lsof -P -i:6666
COMMAND  PID  USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
openocd 4228 riguz    3u  IPv4 0x163b8cdfd65fd7d7      0t0  TCP localhost:6666 (LISTEN)

$ netstat -vanp tcp | grep  6666
tcp4       0      0  127.0.0.1.6666         *.*                    LISTEN      131072 131072   4228      0 0x0100 0x00000006