diff --git a/libi2pd/RouterInfo.cpp b/libi2pd/RouterInfo.cpp
index de641602..bdb2fd03 100644
--- a/libi2pd/RouterInfo.cpp
+++ b/libi2pd/RouterInfo.cpp
@@ -186,6 +186,7 @@ namespace data
 
 	void RouterInfo::ReadFromStream (std::istream& s)
 	{
+		m_Caps = 0;
 		s.read ((char *)&m_Timestamp, sizeof (m_Timestamp));
 		m_Timestamp = be64toh (m_Timestamp);
 		// read addresses
@@ -251,7 +252,7 @@ namespace data
 						LogPrint (eLogWarning, "RouterInfo: Unexpected field 'key' for NTCP");
 				}
 				else if (!strcmp (key, "caps"))
-					address->caps = ExtractCaps (value);
+					address->caps = ExtractAddressCaps (value);
 				else if (!strcmp (key, "s")) // ntcp2 static key
 				{
 					Base64ToByteStream (value, strlen (value), address->ntcp2->staticKey, 32);
@@ -354,7 +355,7 @@ namespace data
 
 			// extract caps
 			if (!strcmp (key, "caps"))
-				m_Caps = ExtractCaps (value);
+				ExtractCaps (value);
 			// extract version
 			else if (!strcmp (key, ROUTER_INFO_PROPERTY_VERSION))
 			{
@@ -403,40 +404,59 @@ namespace data
 		return m_Family == fam;
 	}
 
-	uint8_t RouterInfo::ExtractCaps (const char * value)
+	void RouterInfo::ExtractCaps (const char * value)
 	{
-		uint8_t caps = 0;
 		const char * cap = value;
 		while (*cap)
 		{
 			switch (*cap)
 			{
 				case CAPS_FLAG_FLOODFILL:
-					caps |= Caps::eFloodfill;
+					m_Caps |= Caps::eFloodfill;
 				break;
 				case CAPS_FLAG_HIGH_BANDWIDTH1:
 				case CAPS_FLAG_HIGH_BANDWIDTH2:
 				case CAPS_FLAG_HIGH_BANDWIDTH3:
-					caps |= Caps::eHighBandwidth;
+					m_Caps |= Caps::eHighBandwidth;
 				break;
 				case CAPS_FLAG_EXTRA_BANDWIDTH1:
 				case CAPS_FLAG_EXTRA_BANDWIDTH2:
-					caps |= Caps::eExtraBandwidth | Caps::eHighBandwidth;
+					m_Caps |= Caps::eExtraBandwidth | Caps::eHighBandwidth;
 				break;
 				case CAPS_FLAG_HIDDEN:
-					caps |= Caps::eHidden;
+					m_Caps |= Caps::eHidden;
 				break;
 				case CAPS_FLAG_REACHABLE:
-					caps |= Caps::eReachable;
+					m_Caps |= Caps::eReachable;
 				break;
 				case CAPS_FLAG_UNREACHABLE:
-					caps |= Caps::eUnreachable;
+					m_Caps |= Caps::eUnreachable;
 				break;
+				default: ;
+			}
+			cap++;
+		}
+	}
+
+	uint8_t RouterInfo::ExtractAddressCaps (const char * value) const
+	{
+		uint8_t caps = 0;
+		const char * cap = value;
+		while (*cap)
+		{
+			switch (*cap)
+			{
+				case CAPS_FLAG_V4:
+					caps |= AddressCaps::eV4;
+				break;	
+				case CAPS_FLAG_V6:
+					caps |= AddressCaps::eV6;
+				break;		
 				case CAPS_FLAG_SSU_TESTING:
-					caps |= Caps::eSSUTesting;
+					caps |= AddressCaps::eSSUTesting;
 				break;
 				case CAPS_FLAG_SSU_INTRODUCER:
-					caps |= Caps::eSSUIntroducer;
+					caps |= AddressCaps::eSSUIntroducer;
 				break;
 				default: ;
 			}
@@ -444,7 +464,7 @@ namespace data
 		}
 		return caps;
 	}
-
+		
 	void RouterInfo::UpdateCapsProperty ()
 	{
 		std::string caps;
@@ -799,7 +819,8 @@ namespace data
 	void RouterInfo::SetCaps (const char * caps)
 	{
 		SetProperty ("caps", caps);
-		m_Caps = ExtractCaps (caps);
+		m_Caps = 0;
+		ExtractCaps (caps);
 	}
 
 	void RouterInfo::SetProperty (const std::string& key, const std::string& value)
diff --git a/libi2pd/RouterInfo.h b/libi2pd/RouterInfo.h
index af8dd8bd..855f16f1 100644
--- a/libi2pd/RouterInfo.h
+++ b/libi2pd/RouterInfo.h
@@ -44,6 +44,8 @@ namespace data
 	const char CAPS_FLAG_EXTRA_BANDWIDTH1 = 'P'; /* 256-2000 KBps */
 	const char CAPS_FLAG_EXTRA_BANDWIDTH2 = 'X'; /*   > 2000 KBps */
 
+	const char CAPS_FLAG_V4 = '4';
+	const char CAPS_FLAG_V6 = '6';
 	const char CAPS_FLAG_SSU_TESTING = 'B';
 	const char CAPS_FLAG_SSU_INTRODUCER = 'C';
 
@@ -67,12 +69,18 @@ namespace data
 				eHighBandwidth = 0x02,
 				eExtraBandwidth = 0x04,
 				eReachable = 0x08,
-				eSSUTesting = 0x10,
-				eSSUIntroducer = 0x20,
-				eHidden = 0x40,
-				eUnreachable = 0x80
+				eHidden = 0x10,
+				eUnreachable = 0x20
 			};
 
+			enum AddressCaps
+			{
+				eV4 = 0x01,
+				eV6 = 0x02,
+				eSSUTesting = 0x04,
+				eSSUIntroducer = 0x08
+			};
+		
 			enum TransportStyle
 			{
 				eTransportUnknown = 0,
@@ -234,7 +242,8 @@ namespace data
 			void WriteToStream (std::ostream& s) const;
 			size_t ReadString (char* str, size_t len, std::istream& s) const;
 			void WriteString (const std::string& str, std::ostream& s) const;
-			uint8_t ExtractCaps (const char * value);
+			void ExtractCaps (const char * value);
+			uint8_t ExtractAddressCaps (const char * value) const;
 			template<typename Filter>
 			std::shared_ptr<const Address> GetAddress (Filter filter) const;
 			void UpdateCapsProperty ();