---
title: "Area code 505: New Mexico, United States"
url: "https://lookvalid.com/area-code/505.md"
canonical_url: "https://lookvalid.com/area-code/505"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 505 serves New Mexico, United States. Number formats, numbering rules, a live phone validator and the other codes in New Mexico."
---

# Area code 505: New Mexico, United States

Area code 505 serves New Mexico, United States. Number formats, numbering rules, a live phone validator and the other codes in New Mexico.

NANPA lists 683 central office codes (prefixes) in use in area code 505, held by 46 holders across 34 rate centers.
The largest rate center is ALBUQURQUE, with 375 prefixes (55%).
Qwest holds the most prefixes, 184 (27%). 65% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 2,711 complaints on file for 2,147 numbers in 505, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1947-01-01
- Time zone: Mountain (M)
- Prefixes in use: 683
- Pooled prefixes: 446 (65%)
- Rate centers: 34
- Companies holding prefixes: 46
- Assignment dates on file: 2001-03-16 to 2026-02-23 (362 prefixes)
- ZIP codes in its places: 42

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| ALBUQURQUE | 375 | 55% |
| SANTA FE | 68 | 10% |
| FARMINGTON | 66 | 10% |
| GALLUP | 35 | 5% |
| AZTEC | 20 | 3% |
| LOS ALAMOS | 16 | 2% |
| LAS VEGAS | 15 | 2% |
| GRANTS | 14 | 2% |
| 26 other rate centers | 74 | 11% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Qwest | 184 | 27% |
| Verizon Wireless | 98 | 14% |
| New Cingular Wireless PCS | 76 | 11% |
| T-Mobile USA | 65 | 10% |
| Onvoy | 54 | 8% |
| Bandwidth.com CLEC | 24 | 4% |
| 40 other carriers | 182 | 27% |

A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company.

## History

- 1947-01-01: Area code 505 went into service.
- 2007-10-07: Area code 575 went into service and names 505 as its parent.

## Nearest area codes

The area codes closest to 505, measured between the centers of the ZIP code places they serve, are 575 (about 157 miles), 719 (about 218 miles), 970 (about 267 miles), 928 (about 275 miles) and 915 (about 285 miles).

## ZIP codes

42 ZIP codes fall in places that have a rate center in this area code. The places with the most are Santa Fe, NM (11 ZIP codes), Farmington, NM (3 ZIP codes) and Gallup, NM (3 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes.

## Complaints on file

2,711 complaints for 2,147 numbers. Numbers whose latest complaint falls in each year:

- 2023: 143
- 2024: 136
- 2025: 115

## Questions

### Where is area code 505?

NANPA assigns area code 505 to New Mexico, United States.

### In which state does area code 505 sit?

New Mexico. 505 is one of 2 area codes the NANPA table assigns to the state.

### Which places does area code 505 cover?

The places with the most ZIP codes among the rate centers in 505 are Santa Fe, NM, Farmington, NM and Gallup, NM. The rate center list on this page shows all of them.

### Who owns area code 505?

NANPA assigns area codes. Within 505, Qwest holds the most prefixes, 184 prefixes or 27%.

### Which time zone does 505 use?

The NANPA NPA report lists the time zone for 505 as Mountain (M).

### What year did 505 enter service?

The NANPA NPA report gives an in-service date of 1947-01-01, so 505 has been in use since 1947.

### Does area code 505 have an overlay?

The NANPA NPA report lists no other area code in an overlay with 505.

### Which area codes are nearest to 505?

The area codes closest to 505, measured between the centers of the ZIP code places they serve, are 575 (about 157 miles), 719 (about 218 miles), 970 (about 267 miles), 928 (about 275 miles) and 915 (about 285 miles).

### How many prefixes does area code 505 have?

NANPA's report dated 2026-10-17 lists 683 prefixes in service in 505, spread over 34 rate centers and 46 holders.

### Are there complaints about 505 numbers?

The FCC data on file has 2,711 complaints for 2,147 numbers in 505. They are unverified consumer reports. A number with no complaints on file is not proven safe.

Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).