| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 725-40** | (301) 725-4000 - (301) 725-4099 | 81 |
| (301) 725-41** | (301) 725-4101 - (301) 725-4199 | 81 |
| (301) 725-42** | (301) 725-4200 - (301) 725-4297 | 75 |
| (301) 725-43** | (301) 725-4300 - (301) 725-4398 | 83 |
| (301) 725-44** | (301) 725-4400 - (301) 725-4498 | 83 |
| (301) 725-45** | (301) 725-4500 - (301) 725-4599 | 80 |
| (301) 725-46** | (301) 725-4600 - (301) 725-4699 | 84 |
| (301) 725-47** | (301) 725-4700 - (301) 725-4799 | 80 |
| (301) 725-48** | (301) 725-4800 - (301) 725-4897 | 71 |
| (301) 725-49** | (301) 725-4900 - (301) 725-4999 | 79 |
US Phone Directory: (301) 725-4***
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