| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 722-40** | (301) 722-4000 - (301) 722-4098 | 70 |
| (301) 722-41** | (301) 722-4100 - (301) 722-4192 | 58 |
| (301) 722-42** | (301) 722-4202 - (301) 722-4296 | 75 |
| (301) 722-43** | (301) 722-4300 - (301) 722-4399 | 74 |
| (301) 722-44** | (301) 722-4400 - (301) 722-4498 | 61 |
| (301) 722-45** | (301) 722-4500 - (301) 722-4599 | 78 |
| (301) 722-46** | (301) 722-4600 - (301) 722-4698 | 64 |
| (301) 722-47** | (301) 722-4700 - (301) 722-4799 | 74 |
| (301) 722-48** | (301) 722-4801 - (301) 722-4897 | 70 |
| (301) 722-49** | (301) 722-4902 - (301) 722-4999 | 66 |
US Phone Directory: (301) 722-4***
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