How to perform a reverse DNS lookup with nslookup
Use nslookup to do a reverse DNS lookup.
nslookup in debug mode is important for displaying additional information when querying DNS records.
By default, nslookup only displays primary name resolution information of the specified host. The information displayed would not be enough to carry out a debugging process.
When the debug mode is enabled, all information such as the set of queries used multiple servers with the responses returned by each are displayed on the screen. With this information, you can trace where a problem is coming from.
To use nslookup in debug mode, use the
$ nslookup -debug my_domain_name
Let's say your querying
$ nslookup -debug google.com Server: 192.168.224.1 Address: 192.168.224.1#53 ------------ QUESTIONS: google.com, type = A, class = IN ANSWERS: -> google.com internet address = 18.104.22.168 ttl = 0 AUTHORITY RECORDS: ADDITIONAL RECORDS: ------------ Non-authoritative answer: Name: google.com Address: 22.214.171.124 ------------ QUESTIONS: google.com, type = AAAA, class = IN ANSWERS: -> google.com has AAAA address 2c0f:fb50:4003:802::200e ttl = 0 AUTHORITY RECORDS: ADDITIONAL RECORDS: ------------ Name: google.com Address: 2c0f:fb50:4003:802::200e