diff --git a/lib/MessageDecoder.ts b/lib/MessageDecoder.ts
index 67f35ef..7cc4572 100644
--- a/lib/MessageDecoder.ts
+++ b/lib/MessageDecoder.ts
@@ -99,7 +99,7 @@ export class MessageDecoder {
     // C-Band puts a 10 char header in front of some message types
     // First 4 chars are some kind of message number
     // Last 6 chars are the flight number
-    let cband = message.text.match(/^(?<msgno>[A-Z]\d{2}[A-Z])(?<airline>[A-Z]{2})(?<number>[0-9]{4})/);
+    let cband = message.text.match(/^(?<msgno>[A-Z]\d{2}[A-Z])(?<airline>[A-Z0-9]{2})(?<number>[0-9]{4})/);
     if (cband?.groups) {
         message.text = message.text.substring(10);
     }
diff --git a/lib/plugins/Label_4N.ts b/lib/plugins/Label_4N.ts
index 4267e31..dc2da8a 100644
--- a/lib/plugins/Label_4N.ts
+++ b/lib/plugins/Label_4N.ts
@@ -26,7 +26,7 @@ export class Label_4N extends DecoderPlugin {
         ResultFormatter.departureAirport(decodeResult, message.text.substring(8, 11));
         ResultFormatter.arrivalAirport(decodeResult, message.text.substring(13, 16));
         ResultFormatter.position(decodeResult, CoordinateUtils.decodeStringCoordinatesDecimalMinutes(message.text.substring(30, 45).replace(/^(.)0/, "$1")));
-        ResultFormatter.altitude(decodeResult, Number(messge.text.substring(48, 51)) * 100);
+        ResultFormatter.altitude(decodeResult, Number(message.text.substring(48, 51)) * 100);
         ResultFormatter.unknownArr(decodeResult, [message.text.substring(2, 4), message.text.substring(19, 29)], " ");
     } else if (fields.length === 33) {
         // variant 2