Tools & Utility

Dig

The Domain Information Groper (dig) is one of the most powerful command-line tools for querying DNS records.

#dns#dig#enumeration#networking

Dig: DNS Querying and Enumeration

dig (Domain Information Groper) is one of the most powerful and widely used command-line tools for querying DNS records.

Why Use dig?

  • 🔍 Retrieve DNS Records – A, AAAA, MX, NS, TXT, CNAME, and more
  • 🔍 Perform Reverse Lookups
  • 🔍 Query Specific Name Servers
  • 🔍 Check DNS Propagation
  • 🔍 Troubleshoot DNS Issues

Installation

bash
# Debian/Ubuntu
sudo apt install dnsutils


Red Hat/CentOS

sudo yum install bind-utils


macOS

brew install bind

Basic Usage

bash
# Query A Record
dig example.com


Query MX Records

dig example.com MX


Query Name Servers

dig example.com NS


Reverse DNS Lookup

dig -x 93.184.216.34


Query Specific Name Server

dig @8.8.8.8 example.com A


Zone Transfer

dig @ns1.example.com example.com AXFR

Automation

bash
# Batch Resolve
for domain in example.com test.com site.com; do
    dig $domain A +short
done


Find Subdomains

for sub in www mail ftp dev; do
    dig "$sub.example.com" A +short
done