WEBVTT

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What is the difference between an A record and an AAAA record?

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They associate a hostname with different types of IP address.

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Match the record to the address type.
6 address-record basics.

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An A record uses IPv4
It associates the name with an IPv4 address.
DNS hostname · A record · IPv4 address

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An AAAA record uses IPv6
It associates the name with an IPv6 address.
DNS hostname · AAAA record · IPv6 address

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The hostname matters
The main domain and WWW can have separate record configurations.
Main domain · WWW hostname · Correct record name

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Use the hosting instructions
The address must match the service prepared to serve the website.
Hosting provider value · Intended service · Correct address type

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Check both supported routes
An old IPv6 destination can cause problems even when IPv4 works.
IPv4 destination · IPv6 destination · Consistent service

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Verify the website as well
A correct DNS answer still needs a working host and HTTPS configuration.
DNS answer · Expected website · Working HTTPS

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Your checklist
An A record uses IPv4 · An AAAA record uses IPv6 · The hostname matters · Use the hosting instructions · Check both supported routes · Verify the website as well

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Use the exact values supplied for the intended hosting service.
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