DNS & Infrastructure

SOA Drift

Compare SOA serials across multiple public resolvers to detect DNS replication lag or split-brain configurations.

About this check

Spot SOA serial drift across global resolvers.

Frequently asked questions

What does the SOA Drift actually check?: Spot SOA serial drift across global resolvers.
Is this really free?: Yes. Every on.bo tool is free, no signup required, no rate-limit tricks.
Do you store the data I check?: We log minimal metadata to keep the service healthy. Lookups themselves are not retained beyond short-term caching.