diff --git a/src/init.cpp b/src/init.cpp
index 890a7d03a..837d73f95 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -463,7 +463,7 @@ bool AppInit2(int argc, char* argv[])
     if (mapArgs.count("-proxy"))
     {
         fUseProxy = true;
-        addrProxy = CAddress(mapArgs["-proxy"]);
+        addrProxy = CService(mapArgs["-proxy"], 9050);
         if (!addrProxy.IsValid())
         {
             wxMessageBox(_("Invalid -proxy address"), "Bitcoin");
@@ -512,7 +512,7 @@ bool AppInit2(int argc, char* argv[])
     {
         BOOST_FOREACH(string strAddr, mapMultiArgs["-addnode"])
         {
-            CAddress addr(strAddr, fAllowDNS);
+            CAddress addr(CService(strAddr, GetDefaultPort(), fAllowDNS));
             addr.nTime = 0; // so it won't relay unless successfully connected
             if (addr.IsValid())
                 AddAddress(addr);
diff --git a/src/net.cpp b/src/net.cpp
index cdd72fddd..b91a8f69c 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -137,7 +137,7 @@ bool GetMyExternalIP2(const CService& addrConnect, const char* pszGet, const cha
 // We now get our external IP from the IRC server first and only use this as a backup
 bool GetMyExternalIP(CNetAddr& ipRet)
 {
-    CAddress addrConnect;
+    CService addrConnect;
     const char* pszGet;
     const char* pszKeyword;
 
@@ -153,7 +153,7 @@ bool GetMyExternalIP(CNetAddr& ipRet)
         //  <?php echo $_SERVER["REMOTE_ADDR"]; ?>
         if (nHost == 1)
         {
-            addrConnect = CAddress("91.198.22.70",80); // checkip.dyndns.org
+            addrConnect = CService("91.198.22.70",80); // checkip.dyndns.org
 
             if (nLookup == 1)
             {
@@ -172,7 +172,7 @@ bool GetMyExternalIP(CNetAddr& ipRet)
         }
         else if (nHost == 2)
         {
-            addrConnect = CAddress("74.208.43.192", 80); // www.showmyip.com
+            addrConnect = CService("74.208.43.192", 80); // www.showmyip.com
 
             if (nLookup == 1)
             {
@@ -529,8 +529,8 @@ void CNode::PushVersion()
 {
     /// when NTP implemented, change to just nTime = GetAdjustedTime()
     int64 nTime = (fInbound ? GetAdjustedTime() : GetTime());
-    CAddress addrYou = (fUseProxy ? CAddress("0.0.0.0") : addr);
-    CAddress addrMe = (fUseProxy ? CAddress("0.0.0.0") : addrLocalHost);
+    CAddress addrYou = (fUseProxy ? CAddress(CService("0.0.0.0",0)) : addr);
+    CAddress addrMe = (fUseProxy ? CAddress(CService("0.0.0.0",0)) : addrLocalHost);
     RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
     PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
                 nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, std::vector<string>()), nBestHeight);
@@ -1204,7 +1204,7 @@ void ThreadOpenConnections2(void* parg)
         {
             BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
             {
-                CAddress addr(strAddr, fAllowDNS);
+                CAddress addr(CService(strAddr, GetDefaultPort(), fAllowDNS));
                 if (addr.IsValid())
                     OpenNetworkConnection(addr);
                 for (int i = 0; i < 10 && i < nLoop; i++)
diff --git a/src/netbase.cpp b/src/netbase.cpp
index 48db3625c..54e311915 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -627,11 +627,12 @@ CService::CService(const char *pszIpPort, bool fAllowLookup)
         *this = ip;
 }
 
-CService::CService(const char *pszIp, int portIn, bool fAllowLookup)
+CService::CService(const char *pszIpPort, int portDefault, bool fAllowLookup)
 {
-    std::vector<CNetAddr> ip;
-    if (LookupHost(pszIp, ip, 1, fAllowLookup))
-        *this = CService(ip[0], portIn);
+    Init();
+    CService ip;
+    if (Lookup(pszIpPort, ip, portDefault, fAllowLookup))
+        *this = ip;
 }
 
 CService::CService(const std::string &strIpPort, bool fAllowLookup)
@@ -642,11 +643,12 @@ CService::CService(const std::string &strIpPort, bool fAllowLookup)
         *this = ip;
 }
 
-CService::CService(const std::string &strIp, int portIn, bool fAllowLookup)
+CService::CService(const std::string &strIpPort, int portDefault, bool fAllowLookup)
 {
-    std::vector<CNetAddr> ip;
-    if (LookupHost(strIp.c_str(), ip, 1, fAllowLookup))
-        *this = CService(ip[0], portIn);
+    Init();
+    CService ip;
+    if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup))
+        *this = ip;
 }
 
 unsigned short CService::GetPort() const
diff --git a/src/netbase.h b/src/netbase.h
index b12fb0045..04ced1826 100644
--- a/src/netbase.h
+++ b/src/netbase.h
@@ -39,8 +39,8 @@ class CNetAddr
     public:
         CNetAddr();
         CNetAddr(const struct in_addr& ipv4Addr);
-        CNetAddr(const char *pszIp, bool fAllowLookup = false);
-        CNetAddr(const std::string &strIp, bool fAllowLookup = false);
+        explicit CNetAddr(const char *pszIp, bool fAllowLookup = false);
+        explicit CNetAddr(const std::string &strIp, bool fAllowLookup = false);
         void Init();
         void SetIP(const CNetAddr& ip);
         bool IsIPv4() const;    // IPv4 mapped address (::FFFF:0:0/96, 0.0.0.0/0)
@@ -91,10 +91,10 @@ class CService : public CNetAddr
         CService(const CNetAddr& ip, unsigned short port);
         CService(const struct in_addr& ipv4Addr, unsigned short port);
         CService(const struct sockaddr_in& addr);
-        CService(const char *pszIp, int port, bool fAllowLookup = false);
-        CService(const char *pszIpPort, bool fAllowLookup = false);
-        CService(const std::string& strIp, int port, bool fAllowLookup = false);
-        CService(const std::string& strIpPort, bool fAllowLookup = false);
+        explicit CService(const char *pszIpPort, int portDefault, bool fAllowLookup = false);
+        explicit CService(const char *pszIpPort, bool fAllowLookup = false);
+        explicit CService(const std::string& strIpPort, int portDefault, bool fAllowLookup = false);
+        explicit CService(const std::string& strIpPort, bool fAllowLookup = false);
         void Init();
         void SetPort(unsigned short portIn);
         unsigned short GetPort() const;
diff --git a/src/protocol.h b/src/protocol.h
index 67e20d94e..a0bf677aa 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -67,7 +67,7 @@ class CAddress : public CService
 {
     public:
         CAddress();
-        CAddress(CService ipIn, uint64 nServicesIn=NODE_NETWORK);
+        explicit CAddress(CService ipIn, uint64 nServicesIn=NODE_NETWORK);
 
         void Init();