DNS Propagation Checker
Check if your DNS records have propagated across multiple resolvers worldwide. Useful after changing DNS records — propagation can take up to 48 hours.
What is DNS Propagation?
When you change a DNS record — such as pointing your domain to a new server or updating an MX record — that change doesn't take effect instantly everywhere. DNS resolvers around the world cache records for a period defined by the TTL (Time To Live) value. Until those caches expire, different users may still see your old DNS data. This is called DNS propagation.
How long does propagation take?
Propagation typically completes within minutes to 48 hours depending on the TTL. Records with TTL of 300 seconds propagate in minutes; records with TTL 86400 take up to 24 hours. Lowering your TTL to 300 a few hours before a DNS change dramatically speeds propagation.
How to read the results
Each row shows a resolver's name, flag, response time, and whether your updated record has arrived. Green 'Propagated' means that resolver has your new value. Red 'Not propagated' means it still has a cached old value. The percentage bar shows how many of the tested resolvers have your latest record.
Common DNS record types
A records map a domain to an IPv4 address. AAAA records map to IPv6. CNAME records alias one domain to another. MX records control email routing. TXT records hold SPF, DKIM, DMARC and verification data. NS records define authoritative nameservers. Propagation timing can differ between record types.