To pay your bill by mail, simply send your payment in the return envelope included with your bill. Make sure you include the payment form from your bill and write your account number on the memo line of your check.
Bill payment address for ACS Local, Long Distance, and Internet:
Alaska Communications Systems
PO Box 196666
Anchorage, AK 99519-6666
Bill payment address for ACS Wireless:
Alaska Communications Systems
PO Box 92400
Anchorage, AK 99509-2400