| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 350-00** | (301) 350-0000 - (301) 350-0099 | 77 |
| (301) 350-01** | (301) 350-0100 - (301) 350-0199 | 76 |
| (301) 350-02** | (301) 350-0200 - (301) 350-0299 | 75 |
| (301) 350-03** | (301) 350-0300 - (301) 350-0399 | 72 |
| (301) 350-04** | (301) 350-0400 - (301) 350-0499 | 77 |
| (301) 350-05** | (301) 350-0500 - (301) 350-0598 | 73 |
| (301) 350-06** | (301) 350-0601 - (301) 350-0697 | 74 |
| (301) 350-07** | (301) 350-0703 - (301) 350-0799 | 69 |
| (301) 350-08** | (301) 350-0804 - (301) 350-0899 | 69 |
| (301) 350-09** | (301) 350-0900 - (301) 350-0998 | 78 |
US Phone Directory: (301) 350-0***
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