Domain Lists From - Whois Registrars & gLTD providers such as VeriSign

I am new to the process of trying to acquire expired domains. At the moment I am trying to focus on how to obtain a list of data that has expiring domains/pending delete etc.

It seems many of the gTLD providers (such as VerSign) and various who is database providers may have this information or perhaps information directly from ICANN.

Is there anywhere in particular that you can go to find databases of expiring domains?

Thanks in advance.