diff --git a/src/sip-dialog-controller.cpp b/src/sip-dialog-controller.cpp
index 35616dcc29..49ca29a3c8 100644
--- a/src/sip-dialog-controller.cpp
+++ b/src/sip-dialog-controller.cpp
@@ -137,6 +137,12 @@ namespace drachtio {
 	}
 	SipDialogController::~SipDialogController() {
 	}
+    bool SipDialogController::isIPv6(const std::string &address)
+    {
+        return address.find(':') != std::string::npos;
+    }
+
+
     bool SipDialogController::sendRequestInsideDialog( const string& clientMsgId, const string& dialogId, const string& startLine, const string& headers, const string& body, string& transactionId ) {
 
         assert( dialogId.length() > 0 ) ;
@@ -838,7 +844,24 @@ namespace drachtio {
                     }
                     else {
                       url_t const * url = nta_outgoing_route_uri(orq);
-                      string routeUri = string((url ? url->url_scheme : "sip")) + ":" + meta.getAddress() + ":" + meta.getPort();
+                      
+                      
+                      // Retrieve address and port from meta
+                        std::string fetchedAddress = meta.getAddress();
+                        std::string fetchedPort = meta.getPort();
+
+                        // Determine the scheme
+                        std::string fetchedScheme = (url ? url->url_scheme : "sip");
+
+                        // Construct routeUri based on IP version
+                        std::string routeUri;
+                        if (isIPv6(fetchedAddress)) {
+                            routeUri = fetchedScheme + ":[" + fetchedAddress + "]:" + fetchedPort;
+                        } else {
+                            routeUri = fetchedScheme + ":" + fetchedAddress + ":" + fetchedPort;
+                        }
+                                            
+                      
                       dlg->setRouteUri(routeUri);
                       DR_LOG(log_info) << "SipDialogController::processResponseOutsideDialog - (UAC) detected nat setting route to: " <<   routeUri;
                     }
@@ -906,6 +929,7 @@ namespace drachtio {
 
         return 0 ;
     }
+   
     void SipDialogController::doRespondToSipRequest( SipMessageData* pData ) {
         string transactionId( pData->getTransactionId() );
         string startLine( pData->getStartLine()) ;
diff --git a/src/sip-dialog-controller.hpp b/src/sip-dialog-controller.hpp
index fc48efb453..c7cf844345 100644
--- a/src/sip-dialog-controller.hpp
+++ b/src/sip-dialog-controller.hpp
@@ -176,6 +176,7 @@ namespace drachtio {
 		bool sendRequestOutsideDialog( const string& clientMsgId, const string& startLine, const string& headers, const string& body, string& transactionId, string& dialogId, string& routeUrl ) ;
     bool respondToSipRequest( const string& msgId, const string& transactionId, const string& startLine, const string& headers, const string& body ) ;		
 		bool sendCancelRequest( const string& msgId, const string& transactionId, const string& startLine, const string& headers, const string& body ) ;
+		bool isIPv6(const std::string &address);
 
 		//NB: doSendXXX correspond to the above, and are run in the stack thread
 		void doSendRequestInsideDialog( SipMessageData* pData ) ;