javascript - Regular expression for IP Address Validation

Question

i want to validate the value is valid IP Address or not..!

I Used to validate like

ValidIpAddressRegex = "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]).){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$";

it's working fine, but when i give the values like 12345678 , its also return true.. How to solve this?

Answer 1

There is a simpler way. You just need to split the string on . and check that every number is between 0 and 255.

Additionally, you can check for hexa and split on : for IPv6.

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Just because I think it's funny:

^(d|[1-9]d|1dd|2([0-4]d|5[0-5])).(d|[1-9]d|1dd|2([0-4]d|5[0-5])).(d|[1-9]d|1dd|2([0-4]d|5[0-5])).(d|[1-9]d|1dd|2([0-4]d|5[0-5]))$

Here is a regex that should handle IPs (v4).