2 area codes assigned to New Mexico · Mountain Time
New Mexico went from one area code in 1947 to 2 today. A split carves territory off its parent; an overlay sits on top of it, which is why newer codes need ten-digit dialling.
Dates from the NANPA area code report, 09/19/2026.
New Mexico spans 4 LATAs — the regions a call is routed within before it becomes long-haul.
505
New Mexico
Mountain Time
4,985 blocks · 34 rate centres
575
New Mexico
Mountain Time
3,300 blocks · 120 rate centres
New Mexico has more than one area code in most regions. Enter a city to see which codes serve it, or check a specific number instead.
New Mexico is served by 2 area codes in the North American Numbering Plan (NANP): 505, 575. All New Mexico numbers are in the Mountain Time zone. Click any area code above to see the cities and rate centers it covers, formatted tel: link examples, and to search for available phone numbers.