DNS Zone File Parser & Generator | iN2 Tools

Parse an existing zone file to audit it for syntax errors, or generate a standard RFC 1035 zone file.

DNS Zone File Parser & BIND Generator

Validate RFC 1035 BIND zone files, extract resource records (A, AAAA, MX, TXT, CNAME, NS, SOA), or build clean production DNS master zone files with automatic SOA serial timestamps.

Understanding RFC 1035 BIND Zone Files

A Master Zone File is a plain-text database file defined in RFC 1035 containing resource records for a DNS zone, starting with control directives like $ORIGIN and $TTL alongside Start of Authority (SOA) parameters.

SOA Record Parameters Explained

  • Serial (YYYYMMDDnn): Version number incremented on every change to trigger slave nameserver AXFR/IXFR synchronization.
  • Refresh: Time interval secondary nameservers wait before polling the primary server for zone updates.
  • Retry: Wait interval before retrying a failed refresh attempt.
  • Expire: Maximum elapsed time before secondary nameservers stop answering queries if the primary server is unreachable.
  • Minimum TTL (Negative Cache TTL): Cache duration for NXDOMAIN responses.

Related DNS Administration Tools