grep regular expression space

greg@SS:/site# less APAC.txt | grep '[0-9]\{2,7\}-[0-9]\{1,2\}-[0-9]\{1\}' > abc.txt

greg@test:/test$ less filtered.txt | grep "^[0-9]\{1,10\}[[:space:]]\{1,20\}[0-9]\{2,7\}-[0-9][0-9]-[0-9]$" > filtered.txt1