Defaults.Exposed › Glossary › DNS propagation

DNS propagation

Also known as: propagation delay, DNS update delay

The waiting period after you change a domain setting, while the rest of the internet catches up — which is why a change can seem to 'not work yet.'

What it is

When you change a domain setting — a new website server, a new email provider — the update doesn’t reach everyone at the same instant. Systems all over the internet keep a temporary copy of your old settings to speed things up, and they only refresh after that copy expires. DNS propagation is the in-between period while those copies expire and the new setting spreads worldwide. It usually takes anywhere from a few minutes to a day or so.

Why it matters to your business

Propagation is the reason a change can look broken when it isn’t. Right after an update, some people may see your new website or reach your new email while others still land on the old one — purely depending on where they are and whose internet they use. Knowing this prevents panic and prevents costly “fixes” that undo correct changes. The practical takeaway: make domain changes outside busy hours and give them time to settle before judging the result.

How to tell / what to do

If you’ve just changed a setting and it works for some people but not others, that’s normal propagation, not a fault — give it time. If a change still hasn’t taken effect after a day, then it’s worth re-checking the setting itself with whoever manages your domain.