New Mexico Area Codes
Complete directory of all 2 active area codes serving New Mexico. The The Land of Enchantment has a population of 2,115,877 (2023 estimate) and uses 2 area codes.
About Area Codes in New Mexico
New Mexico (NM) is the The Land of Enchantment, located in the West region of the United States. With a 2023 population of 2,115,877 residents, New Mexico is served by 2 active area codes. The state capital is Santa Fe and the largest city is Albuquerque.New Mexico's official motto is "Crescit eundo."
Area code assignments in New Mexico follow the North American Numbering Plan (NANP), which has been in effect since 1947. As the state's population and demand for phone numbers grew — driven by the rise of cell phones, fax machines, pagers, and VoIP lines — regulators either split existing area codes geographically or added overlay codes that share the same territory. That's why New Mexico now has 2 codes: 505, 575.
When you receive a call from a New Mexico number, the area code tells you only where the number was originally assigned. Because of Local Number Portability (LNP), which took effect in 2003, callers can keep their phone numbers even when moving across state lines. So while a 505 number was once assigned in New Mexico, the person calling you could be anywhere in the US today.
Time zones in New Mexico
New Mexico observes the Mountain time zone. Daylight Saving Time is observed from the second Sunday in March through the first Sunday in November, when clocks shift forward by one hour. When you call a New Mexico number from outside the state, double-check the local time above each area code detail page to avoid calling at unreasonable hours.
Phone number format in New Mexico
All New Mexico phone numbers follow the standard 10-digit NANP format: (NPA) NXX-XXXX. For local calls within New Mexico, you typically need to dial the full 10-digit number — even for calls within the same area code — because of mandatory 10-digit dialing imposed by the FCC for areas with overlay codes (most of New Mexico's territory). For long-distance calls within the NANP, dial 1 + area code + 7-digit number.
Frequently asked questions about New Mexico area codes
How many area codes does New Mexico have?
New Mexico currently has 2 active area codes: 505, 575.
What is New Mexico's original area code?
The oldest area code(s) in New Mexico were assigned in 1947 as part of the original 86 NANP codes. These legacy codes typically covered the entire state at first, then were split as demand grew.
What time zone is New Mexico in?
New Mexico is in the Mountain time zone.
Will New Mexico get more area codes?
As New Mexico's population and number demand grow, NANPA may assign additional overlay codes. When the current codes run out of available prefixes, regulators announce public hearings and propose new codes. The AreaCodeCentral team tracks these announcements and updates the directory within 24 hours of any new code activation.