Post Office - Phlox W7308 State Highway 47 Phlox, WI 54464 Phone : (715) 489-3632 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--post Offices 703 4th Mattoon, WI 54450 Phone : (715) 489-3632 Business Category Post Offices Government Offices & Public Schools Post Office - Mattoon 811 4th St Mattoon, WI 54450 Phone : (715) 489-3632 Business Category Post Offices Toll-Free           (800) ASK-USPS