REGEX get list of ip addresses

[raids51]

im using some regex code in vb.net to get each ip address in a list that looks like this: ip,ip,ip,ip,ip,ip,ip,ip,ip,ip etc.
but when i use this regex code
( |,).+?(,|\r\n)

it only returns every second ip address. any help is great! im new wih regex

[aryanbs]

You could write a function like this

 Private Function ISValidIP(ByVal IPAddress As String) As Boolean
        Dim validFormat As String = "\b(([01]?\d?\d|2[0-4]\d|25[0-5])\.){3}([01]?\d?\d|2[0-4]\d|25[0-5])\b"
        Dim rxn As System.Text.RegularExpressions.Regex = New System.Text.RegularExpressions.Regex(validFormat)
        If rxn.IsMatch(IPAddress) Then
            Return True
        Else
            Return False
        End If
    End Function

And Find the matching Ip from a list this way

 Dim AllIP As String = "192.122.123.100,122.34.233.23,190.234.33.44"
        Dim IpAddesses As New List(Of String)
 
        For Each Str As String In AllIP.Split(","c)
            If ISValidIP(Str) Then
                IpAddesses.Add(Str)
            End If
        Next