reverse dns lookup

nslookup

reverse dns lookup is the process of resolving an IP address to its associated domain name. It is useful for verifying the ownership of an IP address and diagnosing network issues.

Common Reverse DNS Lookup Tools

  • nslookup: A command-line tool for querying DNS records. It’s commonly used for troubleshooting DNS issues.
  • dig: Another command-line tool that provides more detailed DNS information and allows for flexible querying of DNS records.

How to Perform Reverse DNS Lookups

  1. Using nslookup:
    • Syntax: nslookup [IP address]
    • > nslookup 8.8.8.8
  2. Using dig:
    • Syntax: dig -x [IP address]
    • > dig -x 8.8.8.8

Additional Options for dig

  • +short: Displays only the concise answer, without extra details.
  • +trace: Traces the delegation path from the root servers to the domain’s authoritative DNS servers.
  • +all: Displays all available information for the query.

Examples of Reverse DNS Lookup Commands

  • Query the domain name associated with the IP address 8.8.8.8 using nslookup
  • > nslookup 8.8.8.8
  • Query the domain name associated with the IP address 8.8.8.8 using dig
  • > dig -x 8.8.8.8