--- asterisk-1.2.5/channels/chan_sip.c.findpeer	2006-02-28 00:14:53.000000000 +0900
+++ asterisk-1.2.5/channels/chan_sip.c	2006-03-22 19:46:39.427467640 +0900
@@ -1683,7 +1683,16 @@
 		var = ast_load_realtime("sippeers", "host", iabuf, NULL);	/* First check for fixed IP hosts */
 		if (!var)
 			var = ast_load_realtime("sippeers", "ipaddr", iabuf, NULL);	/* Then check for registred hosts */
-	
+
+		/* Second check for host name */
+		if (!var) {
+		  struct hostent *hp;
+		  in_addr_t addr;
+		  addr = inet_addr(iabuf);
+		  if (hp = gethostbyaddr((const char *)&addr, sizeof(in_addr_t), AF_INET)) {
+		    var = ast_load_realtime("sippeers", "host", hp->h_name, NULL);
+		  }
+		}
 	} else
 		return NULL;