| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 646-80** | (301) 646-8031 - (301) 646-8066 | 3 |
| (301) 646-81** | (301) 646-8100 - (301) 646-8189 | 5 |
| (301) 646-82** | (301) 646-8209 - (301) 646-8216 | 2 |
| (301) 646-83** | (301) 646-8330 - (301) 646-8395 | 2 |
| (301) 646-84** | (301) 646-8420 - (301) 646-8489 | 3 |
| (301) 646-85** | (301) 646-8525 - (301) 646-8566 | 2 |
| (301) 646-86** | (301) 646-8604 - (301) 646-8694 | 5 |
| (301) 646-87** | (301) 646-8761 - (301) 646-8779 | 3 |
| (301) 646-88** | (301) 646-8837 - (301) 646-8895 | 4 |
| (301) 646-89** | (301) 646-8904 - (301) 646-8973 | 5 |
US Phone Directory: (301) 646-8***
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