Yesterday, phone prefixes were changed in eight cities of the country. Formosa now has the 0370 prefix; Catamarca, the 0383; La Rioja, the 0380; San Nicolás, 0336; Tandil, the 0249; Junin, the 0236; Pilar, the 0230, and Escobar, the 0348. Additionally, a "4" should be put before the local numbers.