Bulk domain availability checker

[Galleshem]

Hey guys, what is the best domains availability checker I can find?
I need to check the maximum amount of domains availability I can at the same time, and for the moment the best one I found was the name.com bulk checker but if it's more than like 2k at the same time it's giving me an error page, is there something that can check a lot of domains at the same time but still do it fast?
Not sure if I was clear enough but I hope you can still help me.

 

[JBubba]

Namebright,com allows up to 5k .COM / .NET domains to be searched at a time without being logged in or even having an account. You can't bulk check availability on any other extension with them. I haven't found a great site that allows bulk availability on all extensions that meets my current needs.

 

[Galleshem]

Namebright,com allows up to 5k .COM / .NET domains to be searched at a time without being logged in or even having an account. You can't bulk check availability on any other extension with them. I haven't found a great site that allows bulk availability on all extensions that meets my current needs.

Thanks for the help dude.

 

[Timofey]

In free version available bulk whois check for .com .ru .su, in Whic Pro other cctld, gtld etc...
http://whic.ru/en/free/download

 

[FPForum]

You could also check out www.NameChex.com