| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 374-90** | (301) 374-9000 - (301) 374-9099 | 82 |
| (301) 374-91** | (301) 374-9100 - (301) 374-9199 | 82 |
| (301) 374-92** | (301) 374-9201 - (301) 374-9299 | 90 |
| (301) 374-93** | (301) 374-9300 - (301) 374-9399 | 85 |
| (301) 374-94** | (301) 374-9400 - (301) 374-9499 | 89 |
| (301) 374-95** | (301) 374-9500 - (301) 374-9599 | 79 |
| (301) 374-96** | (301) 374-9601 - (301) 374-9699 | 79 |
| (301) 374-97** | (301) 374-9700 - (301) 374-9799 | 79 |
| (301) 374-98** | (301) 374-9800 - (301) 374-9899 | 25 |
| (301) 374-99** | (301) 374-9900 - (301) 374-9994 | 50 |
US Phone Directory: (301) 374-9***
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