Why do resolvers return different IPs?

DNS records have a TTL. Until a resolver's cache expires, it returns the old value. Propagation is the wave of caches refreshing as their TTLs run out.

How long does propagation take?

Usually under an hour; can be up to 48 hours depending on the lowest TTL in the chain.

DNS Propagation Checker

Query 12 free public DNS resolvers in parallel; spot inconsistencies during a migration.

Call this tool from the API

Get the same result via REST. Create a free API key at /account/api-keys — 100 calls/day on the free tier; 50k on Pro.

# curl — JSON response (default)
curl https://internettimes.com:80/api/v1/dns-propagation/example.com \
  -H "Authorization: Bearer YOUR_API_KEY"

# Markdown response — ingest-friendly for agents
curl "https://internettimes.com:80/api/v1/dns-propagation/example.com?format=md" \
  -H "Authorization: Bearer YOUR_API_KEY"

DNS Propagation Checker

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