DNSDigger.com is a massive reverse lookup service where you can locate "hidden" data in the vast flood of information behind the Internet.
The basic free version gives you a little taste of the whole picture. You can easily sign up for an account and get the whole dataset.
The cost is based on tokens that you buy in advance. The fee is listed below.
IP reverse resolve : 1 token.
IP reverse resolve /24-network : 5 tokens.
Google Analytics reverse lookup : 4 tokens.
AS-Data : 2 tokens.
Introductionary price for tokens :
$10USD for 1000 tokens
$70USD for 10000 tokens
If you need to do some serious bulk calls we can fire up an dedicated virtual machine just for you. Contact us for more info about this.
We use PayPal.