DNS Zone Diff

Compare two zone files and identify added, removed, and changed DNS records

Added Records: Identify new DNS records in the updated zone file.

Removed Records: Find records that were deleted from the original zone.

Changed Records: Detect modifications to existing records' data or TTL.

Zone Comparison Examples

Original Zone

Updated Zone

Zone File Comparison

Comparing zone files helps track DNS changes during migrations, updates, or troubleshooting. It identifies exactly what records were added, removed, or modified between two zone versions.

Change Types

Added records are new entries in the updated zone. Removed records exist in the original but not the updated zone. Changed records have the same owner and type but different data or TTL values.

Diff Formats

Structured format groups changes by type for easy review. Unified diff format follows standard patch conventions, useful for version control systems and automated processing.

Migration Planning

Use zone diffs to plan DNS migrations, verify changes before deployment, and audit modifications. Consider TTL impact on propagation when planning record updates or deletions.