The 505 area code covers Albuquerque, Santa Fe and 26 more places in New Mexico.
Area code 505 is in New Mexico, on Mountain Time. In the 505 area, phone numbers are given out most in Bernalillo County, then San Juan and Santa Fe counties. It has been in service since 1947.
- Where
- 8 counties in New Mexico, mostly Bernalillo County, San Juan County and Santa Fe County
- Time zone
- Mountain Time
- In service since
- 1947, one of the original area codes
- Shares its area with
- No other area code
- Prefixes in use
- 684
- How to dial
- Local calls need all 10 digits: 505-555-0142.
Find out who called you from a 505 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (505) number is on today, use our free carrier lookup.
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Albuquerque holds 55% of the phone prefixes in area code 505.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 684 prefixes in use shows where 505 numbers are actually given out.
- Albuquerque375 prefixes, 55%
- Santa Fe68 prefixes, 10%
- Farmington67 prefixes, 10%
- Gallup35 prefixes, 5%
- Aztec20 prefixes, 3%
- Los Alamos16 prefixes, 2%
- Las Vegas15 prefixes, 2%
- Grants14 prefixes, 2%
Also served: Espanola, Shiprock, White Rock and Abiquiu and 16 smaller places.
Qwest (Lumen) holds the most phone number prefixes in area code 505: 184 of 684.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 684 prefixes in use in 505 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Qwest (Lumen)Lumen's landline company | 184 | 27% |
| AT&T MobilityMobile network | 77 | 11% |
| T-MobileMobile network | 65 | 10% |
| Level 3 (Lumen)Lumen's business and wholesale network | 31 | 5% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 24 | 4% |
| Metro by T-MobileT-Mobile's prepaid brand | 19 | 3% |
| 37 other carriers | 284 | 42% |
65% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
505 has been split once since 1947.
1947
505 is one of the original North American area codes.
2007
On October 7, 2007, 575 splits off and takes part of the 505 area.
A 505 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 505 are 575 and 719.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
These are the questions people ask most about area code 505.
Where is area code 505?
505 covers Albuquerque, Santa Fe, Farmington and Gallup and 24 more places in New Mexico. In the 505 area, phone numbers are given out most in Bernalillo County, then San Juan and Santa Fe counties.
What state is area code 505 in?
New Mexico. 505 is a New Mexico area code on Mountain Time.
What cities use area code 505?
The places holding the most 505 prefixes are Albuquerque, Santa Fe, Farmington, Gallup, Aztec, Los Alamos, Las Vegas and Grants, out of 28 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 505?
No single phone company owns 505. NANPA's records show Qwest (Lumen) holds the most 505 prefixes, 184 of 684, followed by AT&T Mobility and T-Mobile. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 505 in?
505 is on Mountain Time.
When did area code 505 start?
505 is one of the original North American area codes, in service since 1947.
How do I dial a 505 number?
Local calls need all 10 digits: 505-555-0142.
Is 505 a toll-free number?
No. 505 is a regular area code for Albuquerque and Santa Fe in New Mexico, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 505?
The closest are 575 (Las Cruces, New Mexico) and 719 (Colorado Springs, Colorado), measured between the centres of each area.
Who called me from a 505 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 505 a scam?
505 is a real New Mexico area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.