Network Engineering
DNS Record Type Reference
Search DNS record types by name or use case. Covers A, AAAA, CNAME, MX, TXT (SPF/DKIM/DMARC), SRV, CAA, and NS records with format, constraints, and common use cases.
No data is transmitted — everything runs locallyTool
About this tool
DNS Record Type Reference
The DNS Record Type Reference covers A, AAAA, CNAME, MX, TXT, SRV, CAA, and NS record formats with zone apex constraints, priority semantics, and common use cases.
• Look up why CNAME records cannot be used at the zone apex
• Find the correct MX record priority format before configuring email routing
• Reference CAA record format before restricting certificate issuance to one CA
• Check SRV record format for a service discovery configuration
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FAQ
What does this tool tell you?
The DNS Record Type Reference covers A, AAAA, CNAME, MX, TXT, SRV, CAA, and NS record formats with zone apex constraints, priority semantics, and common use cases.
What affects the result most?
A: IPv4 address mapping — most common, used for www, API, mail server hostnames. AAAA: IPv6 address — dual-stack requires both A and AAAA records. CNAME: alias to another name — cannot coexist with other records at same name, no CNAME at zone apex.
How should I use the result?
Use this tool to orient quickly to the concepts, field names, or values you are about to look up in a full specification or vendor documentation. It summarizes the common cases; the authoritative source remains whichever standard or vendor doc defines the values themselves.
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