Reference Data Rate Center Directory PORT ALTO, TX Rate Center PORT ALTO — TX Data last updated: March 10, 2026 LATA 564 State TX Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 28.65999450000001, -96.4133057 Area Codes 361 Top Carriers Carrier OCN NXX Count LA WARD TEL. EXCH., INC. 2103 1
