-Ew seems to be correct
$ netstat -na | grep -E '(16993|16992|16994|16995|623|664)'
tcp6 223 0 fe80::c83d:66ff:.8770 fe80::b80c:4aff:.55664 CLOSE_WAIT
$ netstat -na | grep -Ew '(16993|16992|16994|16995|623|664)'
$
p.s. matthew - in your "about" the link to google is missing an 'o'
Re: quick check for ports