Question 1

What is DNS propagation?

Accepted Answer

It’s the delay between changing authoritative DNS and seeing updates across different resolvers due to caching and TTL.

Question 2

How long does DNS propagation take?

Accepted Answer

Often minutes to hours, but it can take longer depending on TTL and resolver/ISP caching. Plan for 24 hours for important changes.

Question 3

Why do DNS resolvers show different results?

Accepted Answer

They may have different cached answers or refresh schedules. Differences are normal during change windows.

Question 4

Which record type is used for SPF/DMARC?

Accepted Answer

SPF and DMARC are typically TXT records. DMARC is usually on _dmarc.yourdomain.com.

Question 5

Does this tool change my DNS?

Accepted Answer

No—this is a read-only diagnostic tool.

Question 6

Why do I see no records?

Accepted Answer

The record may not exist, the hostname/type may be wrong, or the resolver returned an error. Double-check the exact hostname and record type.

DNS Checker: Lookup A, AAAA, CNAME, MX, NS & TXT Records