lsof -nP -p 2541 -a -i -Tsq In order this causes lsof to -n: display host names Numerically -P: Print ports numerically -p: for Pid 2541 -a: AND -i: only list "Internet network files" (seems to me actually "Network") -Tsq: display connectionState and Queue TCP/IP details (N.b. -T by itself DISABLES the default TCP/IP detail reporting)