No. There is no alert as a campaign approaches 500 and no running count surfaced in the interface. You discover the ceiling when Google rejects the next entry you try to save. Existing exclusions keep working normally and nothing gets dropped automatically, so the only effect is that new additions require you to delete something first.
Does Google warn you before your IP exclusion list is full?Block Click Fraud2026-09-20T07:07:44+00:00