New Mexico area codes

Codes in service in New Mexico

New Mexico has 2 geographic area codes in service: 505, 575. 505 is the oldest, dated 1947, and 575 the newest, dated 7 Oct 2007.1 All of New Mexico's codes are on Mountain time.

Area code	NANPA location	NPA in-service date	In-service overlay peers	Time zone	Local calls within the code
505	NM	1947	None listed	Mountain	10 digits
575	NM	7 Oct 2007	None listed	Mountain	10 digits

Scroll the table sideways to see every column. Sources: NANPA (14 October 2026 file).

History and overlays in New Mexico

Before 1960: 505 (1947)
2000s: 575 (7 Oct 2007)

NANPA lists no in-service overlays among these codes, so each may serve its own part of New Mexico.1

Dialing in New Mexico

Local calls within a single area code in New Mexico (505, 575) are all recorded as 10 digits. From any of New Mexico's codes, local calls to another area code are all recorded as 10 digits.1

Neighbours of New Mexico

Regions that border New Mexico:

Arizona: 5 codes (480, 520, 602, 623, ...)
Colorado: 6 codes (303, 719, 720, 748, ...)
Oklahoma: 5 codes (405, 539, 572, 580, ...)
Texas: 29 codes (210, 214, 254, 281, ...)

Rules that apply to every region are on the area-code reference.

Get a number in New Mexico

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Sources

Every regulatory and pricing claim on this page links to the primary source it came from. Figures were checked on the date shown at the top of the page; rules and prices change, so verify before relying on one.

NANPA, NPA Database CSV, file dated 14 October 2026; US geographic codes, location, dates, overlay complexes, dialing plan and time zone. Retrieved 14 Oct 2026
https://reports.nanpa.com/public/npa_report.csv