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The default port number is 53. All Rights Reserved. I have a few errors to resolve as shown in my dcdiag. : let me check with 1.1.1.1, What is output on running in a console window, How Intuit democratizes AI development across teams through reusability. Linux is a registered trademark of Linus Torvalds. A limit involving the quotient of two sums, Styling contours by colour and by line thickness in QGIS. I'm excited to be here, and hope to be able to contribute. However, as previously mentioned, the command-line tool can retrieve other address types of a domain through its method of accessing the DNS entries. Another typical scenario is the search for optimal mail servers SMTP, POP, IMAP) for a desired domain. For example, those who use Windows and experience an issue with the active directory can use nslookup to quickly and easily check whether all involved servers are converted in the domain name system as planned. Either way these aren't issues with your command, or script, they're issues with your hardware/software configuration settings. Changes the query class. If it's IPv6-only, make sure you don't have an A record, not even a "fake" one. . nslookup - Default Server Unknown, Address ::1 And what are the pros and cons vs cloud based. To update your OpenDNS IP address only if it has been changed? Why does nslookup script give different results? . . Under your user account, run the nslookup command. But using it for the query can occasionally result in inaccurate results, for example, because the server being searched for is not listed in the cache of the local name server. How to prove that the supernatural or paranormal doesn't exist? Time arrow with "current position" evolving with overlay number. If you dont see MX records, they probably just arent configured for that domain. Alternatively disable IP v6 on your PC. Link-local IPv6 Address . Learn more about Stack Overflow the company, and our products. Because you do have an IPv4 rDNS zone that includes an IPv4 PTR record for the server (as evidenced by the output of nslookup launched from the command prompt), nslookup is able to resolve the host name of the server from the IPv4 PTR record when you launch nslookup from the command prompt. . Continuous ping in Windows, Linux, and MacOS. Beginners who first need to get to know the service can ease the transition by starting nslookup and then learning about syntax and parameters step by step.