New Mexico area codes
New Mexico uses 2 area codes. The oldest is 505, in service since 1947; the newest is 575, from 2007. Across them 1,206 of 1,572 possible number blocks are allocated, 76.7% of capacity. Lumen holds 26.1% of the 1,206 assigned blocks across the state, ahead of Verizon at 13.2%; a further 17.2% sits with CLEC and VoIP holders outside the national carriers. In the 33 days to 30 October 2026, FTC complaints named a New Mexico caller ID 1,475 times – 0.6% of all complaints in the window, most often 575 with 891 (63rd of 422 nationally). NANPA records 154 rate centers across the state's codes, and local calls take all ten digits.
All 2 codes
| Code | In service | Blocks used | Largest holder | Complaints | Shares area with |
|---|---|---|---|---|---|
| 505 | 1947 | 685/786 | Lumen 32.6% | 584 | no overlay |
| 575 | 2007 | 521/786 | Other CLEC / VoIP 26.9% | 891 | no overlay |
Block share is share of allocated number blocks, not of subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and reflect spoofed caller IDs as much as real calls.
How full New Mexico’s codes are
A code holds at most 786 blocks of 10,000 numbers each. When a code fills up, the administrator does not reclaim numbers – it adds an overlay, and from then on new numbers in the same area come from the new code.
Most room left
Who holds the number blocks
Counted from every assigned block in the state: 1,206 blocks, each with the holder NANPA recorded for it. Percentages are measured, not estimated.
| Holder | Blocks | Share of New Mexico | Largest in |
|---|---|---|---|
| Lumen | 315 | 26.1% | 1 code |
| Other CLEC / VoIP | 207 | 17.2% | 1 code |
| Verizon | 159 | 13.2% | – |
| AT&T | 138 | 11.4% | – |
| T-Mobile | 124 | 10.3% | – |
| Onvoy | 108 | 9% | – |
| Windstream | 57 | 4.7% | – |
| Bandwidth | 47 | 3.9% | – |
| Comcast | 11 | 0.9% | – |
| Charter | 10 | 0.8% | – |
| Peerless | 10 | 0.8% | – |
| Telnyx | 6 | 0.5% | – |
“Other CLEC / VoIP” is not one company: it is every holder outside the national carriers counted together, which is what resellers and app-based numbers look like in the records. This is allocation, not subscribers.
Spam complaints naming New Mexico codes
FTC Do Not Call complaints where the caller ID shown was a New Mexico number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are routinely faked, so these are complaints about the code, not calls proven to come from it.
How New Mexico got its codes
1 in the 1940s, 1 in the 2000s. Each code after the first was split off from or overlaid on one already in service.
- 1947 505 goes into service.
- 2007 575 goes into service, split from or overlaid on 505.
Time zones
New Mexico is in Mountain time.
Frequently asked about New Mexico area codes
How many area codes does New Mexico have?
2 in service. They are 505 and 575.
What is the oldest area code in New Mexico?
505, in service since 1947. Every later code in the state was split off from or overlaid on an existing one.
What is the newest area code in New Mexico?
575, from 2007, overlaying 505.
What time zone is New Mexico in?
Mountain time.
Which New Mexico area code gets the most spam complaints?
575 – 891 FTC complaints in the 33 days to 30 October 2026, 63rd of 422 codes nationally. Those are complaints about the caller ID shown, and spam callers routinely fake a local-looking number, so this says the code is imitated often, not that the calls come from there.
Which carrier holds the most New Mexico numbers?
Lumen, with 26.1% of the 1,206 blocks assigned across New Mexico, ahead of Other CLEC / VoIP at 17.2%. This is allocation of blocks by the numbering administrator, not a count of subscribers – people keep their numbers when they switch carriers.
Do you have to dial 10 digits in New Mexico?
Yes. Every code in the state is in an overlay or ten-digit dialing area, so a local call needs the area code too. Dialing seven digits reaches a recording, not a wrong number.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
Figures on this page are counted from those files, not copied from other sites. Spotted an error? Request a correction. How we collect and check: methodology.