diff --git a/index.js b/index.js
index 75638ee..2d67717 100644
--- a/index.js
+++ b/index.js
@@ -100,9 +100,10 @@ function t9ToNumber(input) {
 		T: '8', U: '8', V: '8',
 		W: '9', X: '9', Y: '9', Z: '9'
 	};
-	return String(input).toUpperCase().split('').map(c =>
+	let output = String(input).toUpperCase().split('').map(c =>
 		t9[c] || (/\d/.test(c) ? c : '')
 	).join('');
+	return output.length === 11 ? output : null; // Ensure it's 11 digits
 }
 
 Client.on("interactionCreate", async (interaction) => {