How to see Time-To-Live (TTL) for a DNS record

Time-To-Live (TTL) is a value in DNS records that determines how long a resolver should cache the DNS record before requesting a new one. The lower the TTL value, the more frequently resolvers will query the DNS server for the record, while a higher value will reduce the number of requests.

You can see the Time-To-Live (TTL) for a DNS record by using the nslookup command. Here are the steps to check the TTL for a DNS record:

1. Open a terminal window and run the following command:

for example

2. Look for the TTL value in the output. The value will be in seconds and represents the time for which the record will be cached by a resolver.

Alternatively, you can use the dig command

for example

and look for the TTL value in the output section called ANSWER SECTION

You can also use the host command with option -t

for example

The TTL value is the number of seconds that the DNS resolver should cache the record for before requesting a new one. It is an optional field in a DNS record and if it is not set, the resolver will use a default value, usually set by the administrator.