New mexico country code
The country code for New Mexico is not a country code in the classical sense, as New Mexico is a state in the United States of America, not a sovereign country.
However, if you're looking for the country code for the United States, it is +1.
If you're looking for the area code for New Mexico, it is 505 (for the Albuquerque area) or 575 (for the Las Cruces area).