| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (571) 312-40** | (571) 312-4003 - (571) 312-4099 | 88 |
| (571) 312-41** | (571) 312-4100 - (571) 312-4199 | 89 |
| (571) 312-42** | (571) 312-4200 - (571) 312-4298 | 86 |
| (571) 312-43** | (571) 312-4301 - (571) 312-4399 | 92 |
| (571) 312-44** | (571) 312-4400 - (571) 312-4499 | 87 |
| (571) 312-45** | (571) 312-4500 - (571) 312-4599 | 86 |
| (571) 312-46** | (571) 312-4601 - (571) 312-4699 | 85 |
| (571) 312-47** | (571) 312-4700 - (571) 312-4798 | 91 |
| (571) 312-48** | (571) 312-4800 - (571) 312-4899 | 88 |
| (571) 312-49** | (571) 312-4900 - (571) 312-4958 | 50 |
US Phone Directory: (571) 312-4***
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