575 Area Code: Location, Time Zone, Cities & Scam Guide

October 24, 2026 · Mr Jack
575 Area Code: Location, Time Zone, Cities & Scam Guide

575 Area Code: Location, Time Zone, Cities & Scam Guide

The 575 area code stretches across the southern half of New Mexico — from the college town of Las Cruces at the foot of the Organ Mountains to the alien lore of Roswell, the oilfields around Hobbs, and the white gypsum dunes of White Sands. If a 575 number just appeared on your caller ID, you’re looking at a call from the Land of Enchantment’s southern tier.

This guide covers the full 575 picture: where it’s located, which cities and counties it serves, its time zone, the story of its 2007 split from 505, how to dial it correctly, and how to tell a legitimate New Mexico call from a scam.

575 Area Code at a Glance

Detail Information
Area Code 575
State New Mexico
Region Southern and eastern New Mexico
Largest City Las Cruces
Time Zone Mountain Time (MST/UTC−7 standard, MDT/UTC−6 daylight saving)
Type Geographic split (no overlay)
In Service Since October 7, 2007
Created As Split of area code 505
Dialing 10-digit dialing required since October 24, 2021

Where Is the 575 Area Code Located?

The 575 area code covers the southern and eastern portions of New Mexico — essentially everything outside the north-central corridor. When the 2007 split divided the state, the populous northwestern region (Albuquerque, Santa Fe, Rio Rancho, Farmington, Gallup) kept 505, and the rest of the state — roughly the southern two-thirds by land area — became 575.

The 575 territory is one of the most geographically dramatic area code regions in America. It spans 26 counties and some 239 communities, encompassing:

  • The Chihuahuan Desert and the Organ Mountains around Las Cruces
  • White Sands National Park’s gypsum dunes near Alamogordo
  • The oil and gas country of the Permian Basin around Hobbs and Carlsbad
  • The high plains ranching country of eastern New Mexico
  • The Gila National Forest wilderness around Silver City
  • The Rio Grande valley farming communities from Hatch (the “Chile Capital of the World”) southward

Cities Covered by the 575 Area Code

The largest city in the 575 region is Las Cruces, home to New Mexico State University and the state’s second-largest metro area. Other major cities and towns include:

  • Roswell — famous worldwide for the 1947 UFO incident, and a regional hub for ranching and dairy
  • Hobbs — the economic center of southeastern New Mexico’s oil and gas industry
  • Alamogordo — gateway to White Sands National Park and home to Holloman Air Force Base
  • Clovis — eastern New Mexico’s largest city, anchored by Cannon Air Force Base
  • Carlsbad — gateway to Carlsbad Caverns National Park and a Permian Basin energy hub
  • Silver City — historic mining town at the edge of the Gila Wilderness
  • Deming, Las Vegas (NM), Raton, Socorro, Ruidoso, Portales, Artesia, Truth or Consequences, and Sunland Park

Key counties include Doña Ana, Chaves, Otero, Curry, Eddy, Lea, Luna, Sierra, Lincoln, and Grant.

Note that Albuquerque, Santa Fe, Farmington, Gallup, Rio Rancho, and Los Alamos are not in 575 — those cities kept area code 505.

History of the 575 Area Code

New Mexico was one of the original 86 North American area codes assigned in 1947, receiving 505 for the entire state. For sixty years, a single code served every New Mexico phone number. But population growth in cities like Las Cruces, Roswell, and Hobbs — plus the explosion of cell phones — steadily drained the numbering pool.

On October 7, 2007, the state was divided: the high-population northwestern centers kept 505, and the rest of the state was renumbered with 575. Mandatory dialing of the new code began in October 2008 after a permissive period. The 575 split holds a notable place in telecom history — it was the last area code in the United States created by a geographic split. Every new US area code introduced since 2007 has been an overlay instead.

For fourteen years, 575 operated with traditional seven-digit local dialing. That ended in 2021: because the area code had telephone numbers assigned with the 988 central office code, it conflicted with the nationwide designation of 988 as the Suicide Prevention Lifeline. Like dozens of other area codes, 575 transitioned to mandatory 10-digit dialing on October 24, 2021. No overlay has ever been added to 575, and it continues to serve southern New Mexico as a standalone geographic code.

What Time Zone Is the 575 Area Code?

The entire 575 area code is in the Mountain Time Zone:

  • Mountain Standard Time (MST) — UTC−7, from early November to mid-March
  • Mountain Daylight Time (MDT) — UTC−6, from the second Sunday in March through the first Sunday in November

New Mexico observes daylight saving time statewide, so the whole 575 region shifts together. For callers elsewhere: 575 is one hour ahead of Pacific Time, one hour behind Central Time, and two hours behind Eastern Time.

How to Dial a 575 Area Code Number

Since October 24, 2021, 10-digit dialing is mandatory for all calls in the 575 area — including local calls to the house next door.

Calling within the United States

  • Local call (within 575): Dial all 10 digits — 575 + the 7-digit number (e.g., 575-555-0163). Seven-digit dialing will not complete.
  • Long-distance call from elsewhere in the US: Dial 1 + 575 + the 7-digit number — e.g., 1-575-555-0163.

Calling a 575 number from outside the United States

Dial your country’s international exit code, then 1 (the US country code), then the 10-digit number: exit code + 1 + 575 + number. From Mexico, for example: 00-1-575-555-0163.

Texting a 575 number

Use the full 10-digit number in your messaging app — the same format as voice calls.

Is the 575 Area Code a Scam?

The 575 area code is a legitimate, officially assigned area code. Real calls from 575 numbers come from New Mexico State University offices, White Sands-area businesses, oilfield services companies, hospitals in Las Cruces and Roswell, and hundreds of thousands of residents.

However, scammers spoof local area codes everywhere, and 575 is no exception. Common schemes in the region include:

  • Military-base impersonation — fake calls claiming to be from Holloman or Cannon Air Force Base, targeting military families with “emergency” payment demands.
  • IRS and Border Patrol impersonation — threats of arrest or deportation-related fines; real federal agencies don’t operate this way by phone.
  • Utility shutoff scams — callers posing as El Paso Electric or a local co-op demanding immediate payment by gift card or wire.
  • UFO and tourism ticket fraud — fake Roswell attraction or White Sands tour bookings that harvest credit card numbers.
  • Medicare and Social Security phishing — calls targeting seniors with fake benefit updates.
  • One-ring callbacks — a single ring from an unknown 575 number, designed to get you to call back a premium-rate line.

How to Protect Yourself

  • Let unknown numbers go to voicemail. Legitimate callers leave messages; scammers rarely do.
  • Never wire money, buy gift cards, or share personal data because an inbound caller told you to.
  • Verify independently: hang up, then call the organization on a number you find yourself — not the one that called you.
  • Be skeptical of threats and urgency. Government agencies and utilities send written notices; they don’t demand instant phone payment.
  • Enable spam filtering through your carrier and your phone’s built-in unknown-caller screening.
  • Report fraud to the FTC at reportfraud.ftc.gov and the New Mexico Attorney General’s consumer protection division.

Frequently Asked Questions

What cities are in the 575 area code?

The largest city is Las Cruces. The code also covers Roswell, Hobbs, Alamogordo, Clovis, Carlsbad, Silver City, Deming, Ruidoso, Portales, Socorro, and Truth or Consequences — 239 communities across 26 counties in southern and eastern New Mexico.

Is 575 in New Mexico?

Yes — the 575 area code is entirely within New Mexico, covering the southern and eastern parts of the state. Northern and central New Mexico (Albuquerque, Santa Fe) use 505.

When was the 575 area code created?

Area code 575 was created on October 7, 2007, in a split of area code 505. It was the last US area code ever created by a geographic split.

What time zone is the 575 area code in?

The 575 area code is in the Mountain Time Zone — UTC−7 standard (MST), UTC−6 during daylight saving time (MDT).

Is Las Cruces area code 575 or 505?

Las Cruces is 575. Albuquerque and Santa Fe are 505. This is one of the most common mix-ups for people new to New Mexico.

Do I need to dial 10 digits for local 575 calls?

Yes. Ten-digit dialing has been mandatory in the 575 area since October 24, 2021, when the region transitioned ahead of the nationwide 988 lifeline launch.

Conclusion

The 575 area code is southern New Mexico’s telephone identity — created in 2007 in the last geographic area code split in US history, running on Mountain Time, and covering everything from Las Cruces’ university town energy to Roswell’s desert mystique and Hobbs’ oilfield bustle. Ten-digit dialing is the norm, and no overlay complicates the picture.

A 575 call is, in the vast majority of cases, simply New Mexico reaching out. Keep the usual precautions — screen the unknown, verify the urgent, never pay on demand — and you’ll have nothing to worry about from the Land of Enchantment’s southern code.