Significant events for area code 915
| Date |
Details |
| 1947 | One of the original four area codes for Texas. It covered the northwestern part of the state. |
| 1954 | The eastern area of 915 and a small part of 214 were combined to create 817 |
| 1957 | The northeastern part of the 915 area code (including the Texas Panhandle) and a small area of 817 were combined to create 806 |
| April 5, 2003 | Area code 915 was split three ways with the far western area retaining 915, 432 covering the central area and 325 covering the eastern area |