Wouldn’t checking for DNS NS record existence be a much easier way? Not all TLDs have Whois, but everyone uses DNS -nick On Thu, Jul 25, 2024 at 17:02 Scott Allen via talk <talk@gtalug.org> wrote:
On Thu, 25 Jul 2024 at 16:38, Scott Allen <mlxxxp@gmail.com> wrote:
On Thu, 25 Jul 2024 at 16:27, Scott Allen <mlxxxp@gmail.com> wrote: Doing a grep on whois output for "Registrar:" (perhaps case insensitive) might be fairly reliable. Even that doesn't always work. E.g.: whois abc.de I give up (on using whois, at least).
This is assuming you want something that will work for any TLD. For a single given TLD, the whois output should be consistent enough that you could figure out something to determine if a domain is registered or not.
For instance, for the .ca domain it looks like just checking the first output line for "Not found:" is sufficient to indicate a domain hasn't been registered.
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