*Use also to TEXT American numbers. **00X1 and +1 often work interchangeably from cell phones.
When dialing from Colombia:
X is the long distance carrier code. Here are the codes for Columbia's larger carriers: UNE EPM - 5; ETB - 7; Movistar - 9; Tigo - 414; Avantel - 468; Claro Fixed - 456; Claro Mobile - 444
for example, dialing from Colombia using carrier Movistar: 00X = 009.
