Mastering DNS Queries with nslookup: 10 Essential Commands
This guide walks you through ten practical nslookup commands for retrieving A, NS, SOA, MX, any, server-specific, reverse, PTR, timeout, and debug DNS records, complete with example syntax and screenshots to help you troubleshoot and verify DNS configurations.
Source: Network Engineer Alon
1. How to Find a Domain's A Record
Use nslookup to list A records and their IP addresses.
$ nslookup example.com2. How to View a Domain's NS Records
Checking NS records reveals the authoritative name servers for the domain.
$ nslookup -type=ns example.com3. How to Query a Domain's SOA Record
The SOA record shows the start of authority and zone information.
$ nslookup -type=soa example.com4. How to Find MX Records for Email Exchange
MX records list the mail servers responsible for receiving email for the domain.
$ nslookup -query=mx example.com5. How to Retrieve All Available DNS Records
Querying with type=any returns every DNS record type for the domain.
$ nslookup -type=any example.com6. How to Check a Specific DNS Server's Responsiveness
Use nslookup to query a particular DNS server and see if it answers.
$ nslookup example.com ns1.nsexample.com7. How to Perform a Reverse DNS Lookup
Reverse lookup verifies which domain name is associated with an IP address.
$ nslookup 10.20.30.408. How to View PTR Records
PTR records map an IP address back to its domain name; they are stored under the in-addr.arpa zone.
$ nslookup -type=ptr 96.96.136.185.in-addr.arpa9. How to Adjust the Query Timeout Interval
Modify the timeout (in seconds) to give the DNS server more or less time to respond.
$ nslookup -timeout=20 example.com10. How to Enable Debug Mode
Debug mode provides detailed information about the query process and responses.
$ nslookup -debug example.comSigned-in readers can open the original source through BestHub's protected redirect.
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Liangxu Linux
Liangxu, a self‑taught IT professional now working as a Linux development engineer at a Fortune 500 multinational, shares extensive Linux knowledge—fundamentals, applications, tools, plus Git, databases, Raspberry Pi, etc. (Reply “Linux” to receive essential resources.)
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