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Nslookup

NSLOOKUP

Domain A Record Lookup

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    nslookup example.com

Check Authoritative Name Servers (NS) for a Domain

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    nslookup -type=ns example.com

Query Domain Start of Authority (SoA) Zone Records

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    nslookup -type=soa example.com

Find the Mail Exchange (MX) Records

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    nslookup -query=mx example.com

List all Available DNS Records for a Domain

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    nslookup -type=any example.com

Check the DNS Using a Specific DNS Server

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    nslookup example.com <name server ip or fqdn>

Check Revers DNS Lookup

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    nslookup 10.20.30.40

Check for Domain PTR Record

  • Remember you have to reverse the IP and add in-addr.arpa
  • This will verify the IP belongs to a specific domain
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    nslookup -type=ptr 1.0.168.192.in-addr.arpa

Check which Servers Respond Faster

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    nslookup -timeout=5 example.com

Some Useful Output For Debugging DNS

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    nslookup -debug example.com