Those are the only frequencies range that are transmitted by any 5ghz router. No other frequencies are allowed. So your firestick should work no matter what frequency from the above. Check with wifi analyser app about the exact channel that your router is transmitting.The router is transmitting both 2.4 Ghz and 5 Ghz frequencies but the Firestick only detects frequencies between 36-48 or 149-165 on 5Ghz.