justbea | Get TTL

25 Jun 2018

Get TTL setup for a domain #

Get Nameserver #

Specify the record type NameServer (NS) with the -t flag:

 ❯ host -t NS domain.com

For example:

❯ host -t NS stackoverflow.com

stackoverflow.com name server ns-358.awsdns-44.com.
stackoverflow.com name server ns-1033.awsdns-01.org.
stackoverflow.com name server ns-cloud-e1.googledomains.com.
stackoverflow.com name server ns-cloud-e2.googledomains.com.

Dig TTL #

Use the returned nameserver (which one doesn't matter) to get the TTL entry for the domain:

❯ dig +noall +answer domain.com @nameserver

For example:

❯ dig +noall +answer stackoverflow.com @ns-358.awsdns-44.com.

stackoverflow.com.      300     IN      A       151.101.129.69
stackoverflow.com.      300     IN      A       151.101.1.69
stackoverflow.com.      300     IN      A       151.101.193.69
stackoverflow.com.      300     IN      A       151.101.65.69