Why DNS Changes Take Time (Propagation)

Why DNS Changes Take Time (Propagation)

Summary:
Explains why DNS updates aren’t instant and how TTL affects timing.

When you update DNS, other servers worldwide may still serve old cached data until the previous records’ TTL (Time to Live) expires:

• Short TTL (e.g. 300 seconds) → faster updates, but higher query load.
• Long TTL (e.g. 86400 seconds) → slower updates, but fewer queries.

DNS propagation typically completes within 24–48 hours. To check progress, use:

• WhatsMyDNS.net
• DNSChecker.org