| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 779-00** | (301) 779-0000 - (301) 779-0099 | 73 |
| (301) 779-01** | (301) 779-0100 - (301) 779-0198 | 81 |
| (301) 779-02** | (301) 779-0200 - (301) 779-0299 | 68 |
| (301) 779-03** | (301) 779-0300 - (301) 779-0399 | 79 |
| (301) 779-04** | (301) 779-0401 - (301) 779-0499 | 79 |
| (301) 779-05** | (301) 779-0501 - (301) 779-0598 | 77 |
| (301) 779-06** | (301) 779-0601 - (301) 779-0699 | 74 |
| (301) 779-07** | (301) 779-0701 - (301) 779-0799 | 83 |
| (301) 779-08** | (301) 779-0801 - (301) 779-0899 | 73 |
| (301) 779-09** | (301) 779-0900 - (301) 779-0999 | 81 |
US Phone Directory: (301) 779-0***
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