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Explain AAAA normalization #1119

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Jan 9, 2024
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Explain AAAA normalization #1119

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Change: Explain AAAA normalization
jacegu Jan 9, 2024
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itsalyse Jan 9, 2024
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11 changes: 11 additions & 0 deletions content/articles/aaaa-record.markdown
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Expand Up @@ -54,6 +54,17 @@ In DNSimple, the AAAA record is represented by the following customizable elemen
| Address | The IPv6 address the AAAA record points to. |


## AAAA record normalization

Because the same IPV6 address [can be represented in different ways](https://wikipedia.org/wiki/IPv6_address#Representation), DNSimple normalizes the IPV6 address to the canonical form, as described in [RFC 5952 section 4](https://www.rfc-editor.org/rfc/rfc5952.html#section-4).

Some examples:
- If you provide the IPv6 address `2001:0000:0000:00FE:0000:0000:0000:CDEF`, we will store it as `2001:0:0:fe::cdef`.
- If you provide the IPv6 address `2001:0db8::0001:0000`, we will store it as `2001:db8::1:0`.
- If you provide the IPv6 address `2001:db8:0:0:0:0:2:1`, we will store it as `2001:db8::2:1`.
- If you provide the IPv6 address `::ffff:c000:0280`, we will store it as `::ffff:192.0.2.128`.


## Querying AAAA records

You can use `dig` to determine the AAAA record associated with a domain name. The result is contained in the `ANSWER` section. It contains the fully-qualified domain name (FQDN), the remaining time-to-live (TTL), and the IP address.
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