diff --git a/backend/src/services/WbotServices/CheckNumber.ts b/backend/src/services/WbotServices/CheckNumber.ts
new file mode 100644
index 0000000..80753d6
--- /dev/null
+++ b/backend/src/services/WbotServices/CheckNumber.ts
@@ -0,0 +1,13 @@
+import GetDefaultWhatsApp from "../../helpers/GetDefaultWhatsApp";
+import { getWbot } from "../../libs/wbot";
+
+const CheckContactNumber = async (number: string): Promise<void> => {
+  const defaultWhatsapp = await GetDefaultWhatsApp();
+
+  const wbot = getWbot(defaultWhatsapp.id);
+
+    const validNumber : any = await wbot.getNumberId(`${number}@c.us`);
+    return validNumber.user
+};
+
+export default CheckContactNumber;