diff --git a/include/stdplus/net/addr/ip.hpp b/include/stdplus/net/addr/ip.hpp
index d42605c..afc7d45 100644
--- a/include/stdplus/net/addr/ip.hpp
+++ b/include/stdplus/net/addr/ip.hpp
@@ -268,6 +268,20 @@
     }
 };
 
+template <>
+struct FromStr<InAnyAddr>
+{
+    template <typename CharT>
+    constexpr InAnyAddr operator()(std::basic_string_view<CharT> sv) const
+    {
+        if (sv.find(':') == sv.npos)
+        {
+            return FromStr<In4Addr>{}(sv);
+        }
+        return FromStr<In6Addr>{}(sv);
+    }
+};
+
 } // namespace stdplus
 
 template <>
diff --git a/src/net/addr/ip.cpp b/src/net/addr/ip.cpp
index e411054..96b78cd 100644
--- a/src/net/addr/ip.cpp
+++ b/src/net/addr/ip.cpp
@@ -6,4 +6,5 @@
 template char* ToStr<In4Addr>::operator()(char*, In4Addr) const noexcept;
 template In6Addr FromStr<In6Addr>::operator()(std::string_view) const;
 template char* ToStr<In6Addr>::operator()(char*, In6Addr) const noexcept;
+template InAnyAddr FromStr<InAnyAddr>::operator()(std::string_view) const;
 } // namespace stdplus
diff --git a/test/net/addr/ip.cpp b/test/net/addr/ip.cpp
index 7296a1d..74e72b2 100644
--- a/test/net/addr/ip.cpp
+++ b/test/net/addr/ip.cpp
@@ -153,4 +153,14 @@
     std::hash<InAnyAddr>{}(In6Addr{});
 }
 
+TEST(FromStr, InAnyAddr)
+{
+    constexpr FromStr<InAnyAddr> fs;
+    EXPECT_EQ((In4Addr{}), fs("0.0.0.0"sv));
+    EXPECT_EQ((In6Addr{}), fs("::"sv));
+    EXPECT_EQ(
+        (In6Addr{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 192, 168, 0, 1}),
+        fs("::ffff:192.168.0.1"sv));
+}
+
 } // namespace stdplus