| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (703) 378-10** | (703) 378-1000 - (703) 378-1099 | 65 |
| (703) 378-11** | (703) 378-1100 - (703) 378-1198 | 61 |
| (703) 378-12** | (703) 378-1202 - (703) 378-1297 | 57 |
| (703) 378-13** | (703) 378-1300 - (703) 378-1399 | 76 |
| (703) 378-14** | (703) 378-1403 - (703) 378-1496 | 67 |
| (703) 378-15** | (703) 378-1500 - (703) 378-1599 | 73 |
| (703) 378-16** | (703) 378-1600 - (703) 378-1697 | 69 |
| (703) 378-17** | (703) 378-1701 - (703) 378-1794 | 74 |
| (703) 378-18** | (703) 378-1800 - (703) 378-1899 | 70 |
| (703) 378-19** | (703) 378-1900 - (703) 378-1999 | 76 |
US Phone Directory: (703) 378-1***
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