| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 646-00** | (301) 646-0004 - (301) 646-0079 | 11 |
| (301) 646-01** | (301) 646-0136 - (301) 646-0196 | 2 |
| (301) 646-02** | (301) 646-0203 - (301) 646-0289 | 9 |
| (301) 646-03** | (301) 646-0321 - (301) 646-0381 | 10 |
| (301) 646-04** | (301) 646-0409 - (301) 646-0474 | 5 |
| (301) 646-05** | (301) 646-0512 - (301) 646-0587 | 7 |
| (301) 646-06** | (301) 646-0604 - (301) 646-0647 | 3 |
| (301) 646-07** | (301) 646-0722 - (301) 646-0793 | 7 |
| (301) 646-08** | (301) 646-0823 - (301) 646-0897 | 7 |
| (301) 646-09** | (301) 646-0902 - (301) 646-0993 | 10 |
US Phone Directory: (301) 646-0***
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