grep(1) %2780%2Fopen%2Ftcp%5C%7C443%2Fopen%2Ftcp%5C%7C8080%2Fopen%2Ftcp%27 bigscan.gnmap %7C wc -l
print lines matching a pattern
grep searches the named input FILEs (or standard input if no files are named, or if a single hyphen-minus
(-) is given as file name) for lines containing a match to the given PATTERN.  By  default,  grep  prints
the matching lines.
-l, --files-with-matches
       Suppress normal output; instead print the name of each input file from which output would normally
       have been printed.  The scanning will stop on the first match.  (-l is specified by POSIX.)
source manpages: grep