how to display visitors ISP?

how to display visitors ISP without using commercial DB? is there a free script?

 

echo gethostbyaddr($_SERVER['REMOTE_ADDR']);

PHP:

I think that's all you can do without commercial DB.

 

Sir, is this going to display my Internet Service Provider? like it should display here

http://www.hostip.info/

in the 'Host name' section

 

Yep, it should display the same.

 

Thank you very much Sir!