User Guide
PropagationBase is a DNS monitoring toolkit. Use it to check how your DNS changes are spreading across the internet, inspect full DNS records, validate email authentication setup, and monitor domains for changes.
Propagation Checker
Check how a DNS record is spreading across 30+ global resolvers.
DNS Inspector
See all DNS record types for a domain in one place.
Email Auth Validator
Validate SPF, DMARC, and DKIM records and surface misconfigurations.
Reverse DNS
Look up the hostname associated with an IP address.
Account & Dashboard
Create an account, view recent checks, and manage your profile.
Domains & Alerts
Save domains, set up monitoring, and receive change notifications. Pro feature.