| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 454-00** | (301) 454-0000 - (301) 454-0080 | 4 |
| (301) 454-01** | (301) 454-0100 - (301) 454-0199 | 78 |
| (301) 454-02** | (301) 454-0200 - (301) 454-0299 | 74 |
| (301) 454-03** | (301) 454-0300 - (301) 454-0397 | 69 |
| (301) 454-04** | (301) 454-0401 - (301) 454-0499 | 68 |
| (301) 454-05** | (301) 454-0501 - (301) 454-0599 | 81 |
| (301) 454-06** | (301) 454-0604 - (301) 454-0678 | 7 |
| (301) 454-07** | (301) 454-0703 - (301) 454-0730 | 8 |
| (301) 454-08** | (301) 454-0801 - (301) 454-0899 | 68 |
| (301) 454-09** | (301) 454-0900 - (301) 454-0999 | 67 |
US Phone Directory: (301) 454-0***
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