[#CNetAddr-IsRFC4380]
= xref:CNetAddr.adoc[CNetAddr]::IsRFC4380
:relfileprefix: ../
:mrdocs:

Whether this is an IPv6 Teredo tunnelling address (2001::/32).

== Synopsis

Declared in `<netaddress.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
IsRFC4380() const;
----

== Return Value

True when the address is an IPv6 Teredo tunnelling address.


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