VB.NET - Refactor Class per SOLID principles

Working on a project and the .NET application contained IP's all over the code.  I created a class to put them in one spot based on SOLID.  Looking at the below class can this be refactored?  Should I create an Interface then a class that inherits that Interface and a class for each IP?

Namespace Properties
    Module IPAddress

        Private _ProdIP As String = "1.2.3.4"
        Public ReadOnly Property ProdIP() As String
            Get
                Return _ProdIP
            End Get
        End Property

        Private _TestIP As String = "2.3.4.5"
        Public ReadOnly Property TestIP() As String
            Get
                Return _TestIP
            End Get
        End Property

        Private _QAIP As String = "3.4.5.6"
        Public ReadOnly Property QAIP() As String
            Get
                Return _QAIP
            End Get
        End Property

    End Module
End Namespace

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