Validate IP Address in PowerShell

Often you will come across scenarios where you want to Validate IP Address In PowerShell as a parameter or user input, so today in this article we are discussing few methods to validate the IP Address:

  1. Splitting the IP Address Octets and Typecasting to [Byte]

    byte denotes an integral type that stores unsigned 8-bit integer values within range 0-255.


    and an IP Address is 32-Bit number, or in other words 4 Octets represented each by a numerical label withing range 0-255 separated by a . (dot). So if we simply split a IP Address by . and we typecast individual number to [Byte] PowerShell Type accelerator, then it will throw an error if the number is out of range 0-255.

    [byte[]] ''.split('.')

  2. Using a Regular expressions

    Regular expressions can be used to validate IP Addresses in PowerShell with the -match operator that will validate a pattern depending upon the regex passed to it, like in the following example: but this regex only works for IPv4 addresses:

    $pattern = "^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}$"
    '' -match $pattern

    But this regex only works for IPv4 addresses and you can find one IPv6 as well after a little googling.

  3. Type cast to [System.Net.IPAddress] Class

    PowerShell Type accelerator [IPAddress] which is also an alias of System.Net.IPAddress class can validate IP Addresses if it is typecast-ed against it, and will throw an error when IP Address is out of range or is incorrect in format.

    [IPAddress] ''
    [IPAddress] ''
    [IPAddress] '192.168.0.test'

    Alternatively, you can also use the -As operator to convert an IP Address to System.Net.IPAddress objects, then to Bool data type, so that if the IP Address is valid $true would be returned, otherwise $false

  4. Using TryParse() method of System.Net.IPAddressclass

    .Net Class: System.Net.IPAddress has a TryParse() method that can also validate a IP Address, like in the following code sample:

    # Valid IPAddress
    # Invalid IPAddress

    But, there is a limitation with IPAddress.TryParse method, that is it verifies if a string could be converted to an IP address. So, if you pass a string “7”, it considered as “” and $true would be returned.

If you like this article read more similar articles under ‘N – Ways to’ category

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