North American Numbers Source-cited · ownership disclosed
Area code
505
In service
United States · since 1947

Albuquerque

Area code 505 serves northwestern and central New Mexico, including Albuquerque, Santa Fe, Gallup and Farmington. It was an original 1947 code covering the whole state until 575 split off in 2007.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Albuquerque
Type
geographic
Status
in service
In service since
1947
Projected exhaust
2031 Q3

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 505 is

Northwestern and central New Mexico..

Communities served wholly or partly by 505:

AlbuquerqueSanta FeRio RanchoFarmingtonGallup
B · Relationships

How it relates to other codes

The codes 505 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Spawned · 2007 575 Las Cruces 575 split off from 505 on 2007-10-07 to serve southern and eastern New Mexico.
What's changing. Single code, no overlay.
C · History

How 505 got here

1947-10
Established as one of the original North American area codes, covering all of New Mexico.
Source: Wikipedia
2007-10-07
Southern and eastern New Mexico split off as area code 575; 505 reduced to the northwest/central region.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
701
Prefixes available
99
Thousands-blocks assigned
3,474

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 505 with another code →
Sources
Wikipedia ↗
Area code 505
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.