| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (412) 279-50** | (412) 279-5000 - (412) 279-5099 | 73 |
| (412) 279-51** | (412) 279-5100 - (412) 279-5198 | 74 |
| (412) 279-52** | (412) 279-5200 - (412) 279-5297 | 70 |
| (412) 279-53** | (412) 279-5300 - (412) 279-5398 | 74 |
| (412) 279-54** | (412) 279-5400 - (412) 279-5499 | 73 |
| (412) 279-55** | (412) 279-5500 - (412) 279-5599 | 67 |
| (412) 279-56** | (412) 279-5602 - (412) 279-5699 | 71 |
| (412) 279-57** | (412) 279-5700 - (412) 279-5799 | 73 |
| (412) 279-58** | (412) 279-5800 - (412) 279-5899 | 73 |
| (412) 279-59** | (412) 279-5900 - (412) 279-5999 | 81 |
US Phone Directory: (412) 279-5***
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