Here's a straightforward rundown of DNS record types, what they do, and how you'll actually see them used in the wild. Think of this as a reference guide rather than a step-by-step setup manual.

Core DNS Record Types

Record Type Purpose Example Common Usage
APoints a hostname to an IPv4 addressexample.com → 93.184.216.34Websites
AAAAPoints a hostname to an IPv6 addressexample.com → 2606:2800::IPv6 websites
CNAMECreates an alias for another hostnamewww → example.comHost aliases
MXTells the world where to send your emailmail.example.comEmail delivery
NSPoints to your DNS serversns1.example.comDNS delegation
TXTHolds text-based info like SPF recordsSPF, verificationEmail & security
SOAThe master control record for your zoneSerial, TTLDNS control

Advanced DNS Record Types

Record Type Purpose Typical Use
PTRDoes reverse DNS lookupsIP to hostname
SRVHelps apps find services on your networkVoIP, LDAP
CAAControls which CAs can issue certs for your domainSSL/TLS control
NAPTRHandles dynamic routing in telecomTelecom services
DSPart of DNSSEC security chainDNSSEC chain
DNSKEYHolds the public key for signing your zoneZone signing
RRSIGDNSSEC signature that proves records are legitRecord validation

Email‑Related DNS Records

Record Used For Why It Matters
MXMail deliveryTells servers where to send your mail
SPF (TXT)Sender validationStops people from spoofing your domain
DKIM (TXT)Email signingProves your emails are actually from you
DMARC (TXT)Policy enforcementGives you control over how your mail is handled

Accuracy & Limitations

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