tesrx

I have hundreds of domain names, and my registrar (Gandi) recently started shutting down my email inboxes. A few domains utilize Zoho's email for custom domains, but I was wondering if anyone else has suggestions.

Currently I am downloading and parsing the .com TLD zone file and extracting all mapped NS records. However, this doesn't cover cases where a NS record isn't present.

What is the most reliable/accurate way of determining all registered domain names (.com TLD only for now).