| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 790-00** | (301) 790-0000 - (301) 790-0099 | 82 |
| (301) 790-01** | (301) 790-0100 - (301) 790-0199 | 78 |
| (301) 790-02** | (301) 790-0201 - (301) 790-0299 | 81 |
| (301) 790-03** | (301) 790-0300 - (301) 790-0398 | 78 |
| (301) 790-04** | (301) 790-0400 - (301) 790-0499 | 75 |
| (301) 790-05** | (301) 790-0500 - (301) 790-0599 | 80 |
| (301) 790-06** | (301) 790-0600 - (301) 790-0699 | 83 |
| (301) 790-07** | (301) 790-0700 - (301) 790-0799 | 76 |
| (301) 790-08** | (301) 790-0800 - (301) 790-0897 | 70 |
| (301) 790-09** | (301) 790-0901 - (301) 790-0999 | 79 |
US Phone Directory: (301) 790-0***
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