Reference Data MILLETT, TX Rate Center MILLETT — TX Data last updated: March 10, 2026 LATA 566 State TX Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 28.58155343679672, -99.19893583985755 Area Codes 830 Top Carriers Carrier OCN NXX Count VALLEY TEL. COOP., INC. 2159 1
