[#IPV4_IN_IPV6_PREFIX]
= IPV4&lowbar;IN&lowbar;IPV6&lowbar;PREFIX
:mrdocs:

Prefix of an IPv6 address when it contains an embedded IPv4 address&period; Used when (un)serializing addresses in ADDRv1 format (pre&hyphen;BIP155)&period;

== Synopsis

Declared in `&lt;netaddress&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
inline constexpr std::array&lt;uint8&lowbar;t, 12&gt; IPV4&lowbar;IN&lowbar;IPV6&lowbar;PREFIX = &lcub;
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF&rcub;;
----


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