RegEx/IPv4Address.regex.txt
# Matches an IPv4 Address
(?>[0-2][0-5][0-5]|[0-1]\d\d|\d{1,2}) # Match a series of digits (up to 255), \. # followed by a dot, (?>[0-2][0-5][0-5]|[0-1]\d\d|\d{1,2}) # followed by another series of digits (up to 255), \. # followed by a dot, (?>[0-2][0-5][0-5]|[0-1]\d\d|\d{1,2}) # followed by another series of digits (up to 255), \. # folowed by a dot, (?>[0-2][0-5][0-5]|[0-1]\d\d|\d{1,2}) # followed by a final series of digits (up to 255) (?=\D|$) # followed by a non-digit or end of string. |