:relfileprefix: ../../../
[#boost-urls-ipv4_address-max_str_len]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/ipv4_address.adoc[pass:[ipv4_address]]::max_str_len


The number of characters in the longest possible IPv4 string.


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/ipv4_address.hpp#L60[boost/url/ipv4_address.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
constexpr
static
xref:std.adoc[std]::size_t const max_str_len = 15;
----

== Description


The longest ipv4 address string is "255.255.255.255".



