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The complete network, DNS, email & domain diagnostic platform for engineers who care about uptime and deliverability.

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Email & Deliverability

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  • DMARC Generator

Network

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  • ASN Lookup
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SSL / TLS

  • SSL Checker
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Domain

  • WHOIS Lookup
  • Domain Age
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  • Domain Health Score

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ToolsEmail & DeliverabilitySPF Lookup
Email & Deliverability

SPF Lookup

Retrieve the SPF TXT record, expand its mechanisms and count DNS lookups against the RFC 7208 limit.

Enter a value above and run the check to see results here.

How it works

Retrieve the SPF TXT record, expand its mechanisms and count DNS lookups against the RFC 7208 limit.

Related tools

DKIM LookupDMARC LookupDMARC GeneratorBIMI Lookup

Frequently asked questions

Is the SPF Lookup tool free to use?+

Yes. The SPF Lookup runs directly in NetInsight with no signup required. Usage is rate limited per IP address to keep the service fast for everyone.

Are my queries logged?+

Diagnostic inputs are processed to produce your result and are not sold or shared. See our Privacy Policy for full detail on retention.

How accurate are the SPF Lookup results?+

Results are fetched live from authoritative sources each time you run a check, so they reflect the current state rather than a cached snapshot.

More Email & Deliverability tools

Email & Deliverability

DKIM Lookup

Retrieve a DKIM public key by selector.

Email & Deliverability

DMARC Lookup

Read and interpret a DMARC policy.

Email & Deliverability

DMARC Generator

Build a valid DMARC record interactively.

Email & Deliverability

BIMI Lookup

Check for a BIMI brand logo record.