TTL, or time to live, is how long DNS answers may be cached before being looked up again.
It is set in seconds on each record. A TTL of 3600 means one hour. A long TTL means slower changes but less lookup traffic.
Before a launch, lower the TTL on the records you plan to change a day ahead. Then the switch takes minutes instead of a day.
Our go-live checklist includes lowering TTL early and raising it again after the site is stable on your domain.
Propagation is the wait while DNS servers around the world pick up a record change.
DNS is the phone book that turns your domain name into the address of the server that holds your site.
An A record points your domain name to the numeric address of a server.
A cache is a saved copy of something so it does not need to be fetched or built again.
Paste your URL. We rebuild it, show you the match, and measure the speed. No template. No blank page. Human review from start to finish.
