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Email & DNS

SOA Serial Generator

Create a readable SOA serial using the YYYYMMDDnn convention.

Calculations run in your browser. The tool does not send your inputs to a server.

01Your inputs

Local workspace

Start with the sample below, or enter your own values.

Enter a numeric value using the unit shown in the label.

02Your result

Your result will appear here. Choose an action after checking your inputs.

A quick guide

How to use this tool

  1. Check the example and the unit beside each input.
  2. Enter your values and choose Generate.
  3. Review the result and assumptions, then copy what you need.

Reset example restores the starting values. Clear removes text and number inputs, returns choices to their first valid option, and removes the result.

Reference guide

Explanation and worked examples

Increase nn for each same-day zone revision. The convention helps operators; authoritative and secondary servers ultimately compare serials using DNS serial arithmetic.

Use in day-to-day IT work

Prepare a readable SOA version for a manually managed DNS zone.

Checks before applying the result

  • Compare with the current serial under RFC 1982 arithmetic; YYYYMMDDnn does not guarantee a newer value.
  • Use the provider-managed serial for managed zones. This generator rejects impossible dates and values outside the 32-bit field.
New to the terminology?
SPF
Sender Policy Framework: authorises sending hosts for a domain used by SMTP.
MTA-STS
A published policy for authenticated TLS delivery to declared MX hosts.
TTL
How long a DNS answer may normally remain cached.

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