How to bulk check domains availability for free ?

I would like to show you some great tool it’s free and you can check alot of domains if they are available for registration, this tool allow to check up to 1000 domains in one time 🙂

the tools is available on dynadot.com we can put there up to 1000 domains and check for availabilty, it is really cool and free tool.

Registration on this website is not needed, and captcha also is not needed, website has integrated api so we can even create our own application/software and check availability of domains via our own software 🙂