Area code 348 is currently unassigned within the North American Numbering Plan, meaning it is not in use in the United States, Canada, or other participating countries.
However, in Mexico, area code 348 is assigned to certain regions.
If you encounter a phone number with a 348 area code, it’s important to consider the full number, including the country code, to determine its origin.
For the most accurate and up-to-date information on area codes, you can consult the official list of North American Numbering Plan area codes.
Source: Wikipedia
