Network

DNS Record Builder

Generate valid DNS zone record lines for common record types.

Last validated: 2026-02-14

DNS Record Builder helps create correctly formatted zone records for A, AAAA, CNAME, MX, TXT, and related entries. It is useful for reducing syntax mistakes during manual DNS updates. The tool standardizes record text so changes are easier to review and paste into your DNS provider. Use it as a drafting step before applying production zone updates.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

DNS Record Inputs

Output

Zone record:

app.example.com. 3600 IN A 203.0.113.10

Use for IPv4 host mapping.

How to use this tool

Choose a record type and fill in name, value, and TTL fields.
Generate the record line and review formatting.
Paste into your DNS zone and verify with a follow-up lookup.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

Name: app.example.com
Record type: A
Ttl: 3600
Value: 203.0.113.10
Priority: 10
Record: app.example.com. 3600 IN A 203.0.113.10
Tips: Use for IPv4 host mapping.

Expected Outputs

Ttl: 3600
Priority: 10

Interpretation

Ttl is 3600. Use this as a decision input, not as a standalone conclusion.
Priority is 10. Use this as a decision input, not as a standalone conclusion.
Confirm unit consistency and operational constraints before applying this result in production or field conditions.

Scenario Compare (A vs B)

Use this to compare two input sets and quantify change in key outputs.

Scenario A

Name

Record type

Ttl

Value

Priority

Record

Tips

Scenario B

Name

Record type

Ttl

Value

Priority

Record

Tips

Formula References

IPv4/IPv6 addressing rules and common protocol arithmetic.
DNS/WHOIS/network calls depend on external resolvers and current network state.

Assumptions

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Tailored guides for specific audiences, regions, and scenarios.

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