# SOA Record Lookup

Read a zone’s SOA record field by field: primary nameserver, contact mailbox, serial (and the date it encodes), refresh, retry, expire and negative-caching TTL, checked against recommended ranges.

Canonical: https://tamperbox.dev/soa-lookup

Reviewed: 2026-10-14

## Capabilities and processing

Enter a name or paste SOA records (dig or zone file lines). A name is sent to our server, which asks a public resolver; pasted records are read in your browser.

The SOA record field by field: primary nameserver, contact mailbox, serial (and the date it encodes), refresh, retry, expire and negative-caching TTL, each timer checked against RFC 1912. Below the apex, the zone’s SOA is shown with a note.

## Example workflow

The sample zone uses a date-based serial and timers in range. Break it shows timers out of range and a malformed record.

## Limits and interpretation

Providers often set their own timers; they are reported, not judged wrong, when they fall outside the usual ranges. Nothing is stored.

## Related tools

[All tools](https://tamperbox.dev/) · [Privacy](https://tamperbox.dev/privacy)