2 examples for dig
# Scrub all extra information and get all record for domain
dig +nostats +nocomments +nocmd +noquestion +recurse YOUR.DOMAIN any
# Find IP where domain resolves and TTL
dig EXAMPLE.COM
# Find IP where domain resolves and TTL using a specific name server
dig EXAMPLE.COM @EG.NAMESERVER.COM
# List mail servers
dig example.com MX +noall +answer
# Reverse DNS lookup for a specific IP address
dig -x 127.0.0.1