| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 948-60** | (301) 948-6000 - (301) 948-6099 | 38 |
| (301) 948-61** | (301) 948-6100 - (301) 948-6199 | 45 |
| (301) 948-62** | (301) 948-6200 - (301) 948-6299 | 42 |
| (301) 948-63** | (301) 948-6300 - (301) 948-6399 | 33 |
| (301) 948-64** | (301) 948-6400 - (301) 948-6499 | 41 |
| (301) 948-65** | (301) 948-6500 - (301) 948-6596 | 40 |
| (301) 948-66** | (301) 948-6600 - (301) 948-6697 | 35 |
| (301) 948-67** | (301) 948-6700 - (301) 948-6798 | 39 |
| (301) 948-68** | (301) 948-6800 - (301) 948-6890 | 38 |
| (301) 948-69** | (301) 948-6900 - (301) 948-6998 | 35 |
US Phone Directory: (301) 948-6***
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