Albuquerque, New Mexico

Where Is Area Code 505?

Area code 505 is in northwestern and central New Mexico, including Albuquerque. It serves the northwestern part of the state after a 2007 split created area code 575 for southern and eastern New Mexico. The region includes the Albuquerque metropolitan area and many communities north and west of it.

Major cities in area code 505 include Albuquerque, Rio Rancho, Farmington, Gallup, and Los Alamos. The area code also covers communities such as Santa Fe in north-central New Mexico, along with parts of Bernalillo County, Sandoval County, San Juan County, McKinley County, and Los Alamos County. Albuquerque is the largest city in the area code.

Area code 505 covers well-known New Mexico landmarks and landscapes. These include the Rio Grande, the Sandia Mountains east of Albuquerque, Petroglyph National Monument on Albuquerque’s west side, and parts of the Four Corners region in the northwest. The area also includes major research and cultural sites such as Los Alamos National Laboratory and historic Santa Fe.

History of Area Code 505

Area code 505 was established in 1947 as one of the original North American area codes. It originally served the entire state of New Mexico for six decades. This made 505 the statewide area code during a long period of population growth and expanding phone service.

Area code 505 changed on October 7, 2007, when New Mexico split into two numbering plan areas. Area code 575 took over southern and eastern New Mexico, and 505 remained in the northwestern and central part of the state. New Mexico does not use an overlay for 505, so 505 remains a split area code rather than an overlay code.

Key Facts About Area Code 505

• Area code 505 is in the state of New Mexico, and its largest city is Albuquerque.
• Area code 505 is in the Mountain Time Zone.
• Area code 505 was created in 1947 as one of the original area codes in the North American Numbering Plan.
• Area code 505 served all of New Mexico until October 7, 2007, when area code 575 was created in a geographic split.
• Area code 505 covers central and northwestern New Mexico, including Albuquerque, Rio Rancho, Santa Fe, Farmington, Gallup, and Los Alamos.
• The University of New Mexico in Albuquerque is one of the major institutions in area code 505.
• Los Alamos National Laboratory is located in the 505 area code region.
• Petroglyph National Monument and the Sandia Mountains are notable landmarks within the 505 service area.

Frequently Asked Questions

What state is area code 505 in?

Area code 505 is in New Mexico.

What major cities use area code 505?

Major cities in area code 505 include Albuquerque, Rio Rancho, Santa Fe, Farmington, Gallup, and Los Alamos.

Is area code 505 a toll-free number?

No. Area code 505 is a geographic area code for parts of New Mexico.