Find Local Hotels - Customer Service/Reservations Center Reservations Center Hours: Open 24 Hours a Day, 7 Days a Week. Customer Service is available Monday through Friday, 8 AM through 8 PM, CST (Add 6 Hours to Times for GMT) Toll Free 1-888-254-0637, USA and Canada International Toll Free 00-800-84469370 or +1-210-507-5997 Give Promo Code 9560 when calling. 972-894-1221, Fax