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Area Codes in ALTO Info
| Area Code: | ALTO |
| States: | Michigan, New Mexico, Texas |
| Cities: | Alto |
Exchanges in Area Code ALTO
| Exchange | State | County | City |
| 575-226 | New Mexico | Lincoln | Alto |
| 575-336 | New Mexico | Lincoln | Alto |
| 936-858 | Texas | Cherokee | Alto |
| 936-867 | Texas | Cherokee | Alto |
| 616-868 | Michigan | Kent | Alto |
| 936-879 | Texas | Cherokee | Alto |