diff --git a/package.json b/package.json
index e28de5c..631f36b 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
     "description": "",
     "scripts": {
         "dev": "nodemon",
+        "debug": "node --inspect-brk=0.0.0.0:9229 --require ts-node/register src/app.ts",
         "build": "shx rm -rf ./dist/ && tsc && shx cp -r openapi dist/openapi",
         "build:clients": "bash scripts/build-clients.sh",
         "start": "node dist/app.js",
diff --git a/src/config/config.json b/src/config/config.json
index 06cf14f..a158d10 100644
--- a/src/config/config.json
+++ b/src/config/config.json
@@ -19,6 +19,6 @@
 	"NUMBER_OF_NODE_REQUEST_CHUNK": 10,
 	"NODE_PEERS_REQUEST_CHUNK_SIZE": 50,
 	"CHAIN_HEIGHT_REQUEST_CHUNK_SIZE": 10,
-	"PREFERRED_NODES": ["*.symboldev.network"],
+	"PREFERRED_NODES": [],
 	"MIN_PARTNER_NODE_VERSION": 16777728
 }
diff --git a/src/config/index.ts b/src/config/index.ts
index 013dd4d..c109bc6 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -81,8 +81,6 @@ export const verifyConfig = (cfg: Config): boolean => {
 		error = 'Invalid "NODES"';
 	}
 
-	if (cfg.symbol.PREFERRED_NODES.length === 0) error = 'Invalid "PREFERRED NODES"';
-
 	if (isNaN(cfg.monitor.NODE_MONITOR_SCHEDULE_INTERVAL) || cfg.monitor.NODE_MONITOR_SCHEDULE_INTERVAL < 0)
 		error = 'Invalid "NODE_MONITOR_SCHEDULE_INTERVAL"';
 
diff --git a/src/routes/index.ts b/src/routes/index.ts
index 33b5153..e4bc767 100644
--- a/src/routes/index.ts
+++ b/src/routes/index.ts
@@ -37,10 +37,13 @@ export class Routes {
 			}
 
 			// ?filter=preferred
-			// it filter by host / domain name config by admin.
+			// it filters by host / domain name config by admin.
 			if (filter === NodeFilter.Preferred) {
+				if (!symbol.PREFERRED_NODES?.length) {
+					return Promise.resolve(res.send([]));
+				}
 				Object.assign(searchCriteria.filter, {
-					host: { $in: symbol.PREFERRED_NODES.map((node) => new RegExp(`^.${node}`, 'i')) },
+					host: { $in: symbol.PREFERRED_NODES.map((node) => new RegExp(`^${node}`, 'i')) },
 					'apiStatus.isAvailable': true,
 					'apiStatus.nodeStatus.apiNode': 'up',
 					'apiStatus.nodeStatus.db': 'up',