list - Regex for Comma Delimited IP Addresses -

i have list of ip addresses (each on new line) want find/replace on , make list comma delimited , on same line. regex allow me find ip addresses , regex make list comma delimited mentioned?

i have tried following no luck:

((25[0-5]|2[0-4]\d|[01]?\d\d?)\.(25[0-5]|2[0-4]\d|[01]?\d\d?)\.(25[0-5]|2[0-4]\d|[01]?\d\d?)\.(25[0-5]|2[0-4]\d|[01]?\d\d?)(,\n|,?$))