In 1947, the American Telephone and Telegraph Company designated the entire state of Nevada as a single numbering plan area (NPA) with area code 702. The state was divided into two distinct geographic NPAs in 1998.
| Area code | Year created | Parent NPA | Overlay | Numbering plan area |
|---|---|---|---|---|
| 702 | 1947 | – | 702/725 | southern tip of Nevada, including the Las Vegas metropolitan area |
| 725 | 2014 | 702 | ||
| 775 | 1998 | 702 | – | Nevada other than the southern tip, including Reno and Carson City |
