Reference Data Rate Center Directory POSEN, MI Rate Center POSEN — MI Data last updated: March 10, 2026 LATA 344 State MI Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 45.26350033915611, -83.69970259637712 Area Codes 989 Top Carriers Carrier OCN NXX Count FRONTIER NORTH, INC. - MI 0695 1
