The 505 area code serves northwest and central New Mexico, including the state’s largest city of Albuquerque, the capital of Santa Fe, and Farmington. One of the original area codes assigned in 1947, 505 once covered the entire state and now focuses on the Rio Grande corridor and the northwest.
Quick Summary of the 505 Area Code
| Area Code | 505 |
| State | New Mexico (NM) |
| Region | Northwest & Central New Mexico (Albuquerque, Santa Fe & Farmington) |
| Major Cities | Albuquerque, Santa Fe, Rio Rancho, Farmington, Gallup, Los Alamos, Bernalillo, Grants |
| Time Zone | Mountain Time (MT) – MST / MDT |
| Dialing Format | 7 or 10-digit dialing |
Geographic Coverage
The 505 area code covers northwest and central New Mexico, centered on Albuquerque and its neighbor Rio Rancho, the state capital of Santa Fe to the north, the science town of Los Alamos, and the northwestern cities of Farmington, Gallup, and Grants. It stretches from the Colorado border and the Navajo Nation in the northwest down the Rio Grande valley, and is bordered by the 575 region to the south and east.
Time Zone
The 505 area code observes Mountain Time (MT). Clocks follow Mountain Standard Time (UTC−7) in winter and shift to Mountain Daylight Time (UTC−6) from mid-March through early November. All of New Mexico observes Mountain Time and, unlike neighboring Arizona, does change its clocks for daylight saving. From the West Coast, this region is one hour ahead of Pacific Time, so a 9:00 AM call in California reaches a 505 number at 10:00 AM local time.
Tip: Business hours across the 505 region generally run 9:00 AM to 5:00 PM Mountain Time, Monday through Friday.
How to Dial a 505 Number
Area code 505 is not part of an overlay, so it has traditionally allowed 7-digit local dialing. However, 10-digit dialing is now the recommended nationwide standard, and dialing the full 10-digit number (505 + the line number) always works reliably. For international callers, dial your country’s exit code, then +1 (the North American country code), then 505, followed by the seven-digit local number.
Scam Alerts for the 505 Area Code
Like every U.S. area code, 505 has been used by scammers who spoof local numbers to appear trustworthy. Residents in Albuquerque, Santa Fe, Rio Rancho, Farmington, Gallup, Los Alamos, Bernalillo, Grants should stay alert to the following common tactics:
| Scam Type | What to Watch For |
|---|---|
| IRS / Tax Scams | Callers claiming you owe back taxes and threatening arrest unless you pay immediately. |
| Utility Shut-off | Fake PNM reps demanding payment to avoid disconnection. |
| Bank Fraud Alerts | Robocalls impersonating your bank about “suspicious activity” to phish account details. |
| Grandparent Scam | A caller posing as a relative in trouble asking for emergency wire transfers. |
If you receive a suspicious call from a 505 number, take these steps to protect yourself:
- Do not share personal information such as Social Security numbers, bank details, or passwords over the phone.
- Hang up and verify by calling the organization back using an official number from its website.
- Report the call to the FTC at reportfraud.ftc.gov and to the New Mexico Attorney General’s Office.
- Block the number and consider registering with the National Do Not Call Registry.
Red Flag: Legitimate agencies such as the IRS, Social Security Administration, or your local utility company (PNM or El Paso Electric) will never demand immediate payment by gift card, wire transfer, or cryptocurrency. Any 505 caller making such a demand is a scammer.
History and Economy of the 505 Region
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Area code 505 is one of the original 86 codes established in 1947, and it once covered all of New Mexico before 575 was split off in 2007. Albuquerque anchors the regional economy with Sandia National Laboratories, Kirtland Air Force Base, the University of New Mexico, a growing technology and film-production industry, and the world-famous International Balloon Fiesta. Santa Fe is a renowned art and tourism destination and the oldest state capital in the country, Los Alamos is home to Los Alamos National Laboratory, and Farmington anchors the oil-and-gas economy of the San Juan Basin, while Gallup serves as a hub for Native American arts and trading along Route 66.
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Looking Up a 505 Number
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To identify a 505 caller, use a reverse phone lookup service or search the full 10-digit number online. Many Albuquerque and Santa Fe businesses, government offices, and healthcare providers list their 505 numbers publicly, so a quick search often confirms a legitimate caller. For unknown numbers, let the call go to voicemail – genuine callers usually leave a message, while robocallers and scammers rarely do.
Nearby & Related Area Codes
New Mexico is served by two area codes. If you are researching 505, the neighboring code is worth knowing:
You can also browse our full directory of New Mexico area codes for more regional guides.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border New Mexico:
- Arizona – area code 602
- Colorado – area code 303
- Oklahoma – area code 405
- Texas – area code 214
- Utah – area code 801
Frequently Asked Questions
Where is the 505 area code located?
The 505 area code covers northwest and central New Mexico, including Albuquerque, Santa Fe, Rio Rancho, Farmington, Gallup, Los Alamos, and Grants.
Does 505 have an overlay?
No. The 505 area code covers its region on its own and currently has no overlay code.
Do I need to dial 10 digits for 505?
Because 505 has no overlay, 7-digit local dialing has historically worked, but dialing the full 10 digits is now the recommended standard and always works.
What time zone is the 505 area code in?
The 505 area code observes Mountain Time (MST/MDT), and New Mexico does observe daylight saving time, unlike neighboring Arizona.
Related 505 Guides
- Is a 505 call safe? Read Is area code 505 a scam? Spam & safety guide.
- Local coverage: see the Albuquerque area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.