Any good tool for bulk domains availability checking ?

[TheTom]

Hello, I have massive list of domain names (over 20k) that I wish to filter , I need to filter all the available (not registered) domains.

I know that godaddy has a bulk tool , but he limit to 500 domains and also he has annoying image validation.

Anyone know any tool (website or program) which can do this work (as fast as possible) for me ?

Thanks in advanced,
Tom

[htmlindex]

Don't know of any other sites that'd let you check more than 500 at a time. I know Moniker also has 500 at a time you can check. Not sure if you have the image validation thing or not as I never used it before.

[promo]

The software in my sig links does that...

If they are mainly .com 20K should take around 15 minutes