505 / 575
Telephone area codes for New Mexico. 505 is the oldest of the two, it used to cover the entire state, but now covers Central New Mexico and Northwestern New Mexico. 575 covers the other regions of the state.
Telephone area codes for New Mexico. 505 is the oldest of the two, it used to cover the entire state, but now covers Central New Mexico and Northwestern New Mexico. 575 covers the other regions of the state.