Work out if an IP address is in an ISP's IP range

[jaycook]

Hi,

How can I work out if an IP address is in an ISP's IP range (e.g. 213.226.0.0 - 213.226.15.255). Does anyone know a simple way of doing this or some example code. Thanks for looking!

[Joan Garnet]

You can use

Code: Select all

$ip = getenv(REMOTE_ADDR);

and make whatever you want with that IP

[jaycook]

Thanks but I already know how to get the IP address. What I need to know is how to work out if the IP address is between a specific ISP's IP range e.g. 213.226.1.1 is in the IP range 213.226.0.0 - 213.226.15.255.

Can it be done with a regular expression maybe?

[Oleg Butuzov]

you can separete values in the IP an comere that in the circle...

[jaycook]

Sorry but i'm not entirely sure what you mean. Do you have any example code?

[Oleg Butuzov]

exemple of code? no! who about algoritm?

123.123.133.133 - this is IP

separete values whith explode or split function

analize values in the loop.