List of registered domain names [closed]

Solution 1:

You cannot download a list of all registered domains. There is no such list. DNS is a hierarchal, delegated and distributed service where TLDs (Top Level Domains, e.g. .com and .uk) are managed by disparate registrar authorities. Although changes to ICANN policies appear to be curbing the widespread use of "domain parking", it is still quite common for automated services to be constantly registering new domains and re-registered expired ones. For this reason alone, it's virtually impossible for there to be a single authoritative list of registered domains.

Solution 2:

Depending on what you're going to use that data for, you can get a bulk copy of the ARIN whois database. More information here. I would recommend researching / contacting the other RIRs for information concerning their bulk WHOIS policies.