SOA Record Lookup

SOA (Start of Authority) records define the authoritative information about a DNS zone. Every DNS zone must have exactly one SOA record that specifies the primary nameserver and various timing parameters for the zone.

SOA Record Components:

• Primary Nameserver: The authoritative nameserver for the zone
• Admin Email: Email address of the zone administrator (with @ replaced by .)
• Serial Number: Version number of the zone data (usually YYYYMMDDNN format)
• Refresh: How often secondary nameservers check for updates
• Retry: How long to wait before retrying failed zone transfers
• Expire: When secondary nameservers stop answering queries
• Minimum TTL: Default TTL for records in the zone

Purpose of SOA Records:

• Define zone authority and ownership
• Control zone transfer timing between nameservers
• Specify contact information for zone administration
• Set default caching behavior for zone records