| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (423) 921-70** | (423) 921-7000 - (423) 921-7067 | 4 |
| (423) 921-72** | (423) 921-7200 - (423) 921-7256 | 7 |
| (423) 921-73** | (423) 921-7300 - (423) 921-7399 | 82 |
| (423) 921-74** | (423) 921-7400 - (423) 921-7499 | 72 |
| (423) 921-75** | (423) 921-7500 - (423) 921-7599 | 78 |
| (423) 921-76** | (423) 921-7600 - (423) 921-7699 | 77 |
| (423) 921-77** | (423) 921-7742 - (423) 921-7742 | 1 |
| (423) 921-78** | (423) 921-7800 - (423) 921-7899 | 79 |
| (423) 921-79** | (423) 921-7900 - (423) 921-7999 | 89 |
US Phone Directory: (423) 921-7***
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