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Alex Rivera
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I am writing some code to determine whether a network domain is registered. For example, I want to check if "Google123.com" is available. There are at least two ways I can do this programmatically, but I'm not sure which is more valid: A) In linux/cygwin, I can launch the whois command to see if a domain is in use. B) In linux/windows, i can launch nslookup command to see if a domain is resolvable. My questions are: Is nslookup really a valid way to check for registration? Does every registered domain have a name server and show up in DNS? What is the fastest way to make this registration check? Any tips or other ways to do it?
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