Regex

Network

IP address

Simple (0.0.0.0 to 999.999.999.999)

"([0-9]{1,3}[\.]){3}[0-9]{1,3}"

Valid (0.0.0.0 to 255.255.255.255)

"(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)"