New Mexico · Mountain Time
505 Area Code
Area code 505 is in New Mexico, serving northwestern and central New Mexico, including Albuquerque, Santa Fe and Farmington. It is in the Mountain Time zone.
Last updated October 1, 2026 · Source: NANPA
Where is the 505 area code?
505 is a New Mexico area code covering northwestern and central New Mexico, including Albuquerque, Santa Fe and Farmington. In the wider directory it sits in the West region.
Cities in the 505 area code
- Albuquerque
- Rio Rancho
- Santa Fe
- Farmington
- Gallup
- Los Lunas
- Española
- Los Alamos
- Bernalillo
- Grants
- Belen
- Aztec
- Bloomfield
- Las Vegas
Counties served by 505
Bernalillo County, Sandoval County, Santa Fe County, San Juan County, McKinley County, Valencia County, Rio Arriba County, Los Alamos County, Cibola County and San Miguel County.
Dialing 505
Albuquerque, NM is currently served by the single area code 505, with no overlay. Ten-digit dialing (area code + seven-digit number) always works and is increasingly the norm nationwide; some local calls may still connect with seven digits. If a future overlay is added, 10-digit dialing would become mandatory.
From outside the US, dial +1 505 followed by the seven-digit number.
History of the 505 area code
505 is one of the original area codes assigned in 1947, when AT&T and Bell Laboratories created the North American Numbering Plan and divided the country into the first 86 numbering plan areas. It has served the Albuquerque area ever since.
Is 505 a scam or spam risk?
505 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 505 number on your screen is no guarantee the caller is in Albuquerque, NM or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Explore more
See every code in New Mexico, compare codes across the West region, or view all Mountain Time codes. You can also browse the 5XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
505 area code FAQ
Where is the 505 area code?
The 505 area code is in New Mexico, covering northwestern and central New Mexico, including Albuquerque, Santa Fe and Farmington, in the West region.
What cities are in the 505 area code?
Cities in the 505 area code include Albuquerque, Rio Rancho, Santa Fe, Farmington, Gallup, Los Lunas, Española, Los Alamos, Bernalillo and Grants.
What time zone is 505 in?
505 is in the Mountain Time zone.
When did the 505 area code start?
505 went into service on January 1, 1947 as one of the original 1947 North American area codes.
Do I have to dial 10 digits for 505?
Ten-digit dialing always works, and many areas now require it; some local calls in this area may still connect with seven digits.
Is 505 a toll-free or premium code?
No. 505 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.