| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 929-30** | (301) 929-3000 - (301) 929-3099 | 53 |
| (301) 929-31** | (301) 929-3102 - (301) 929-3199 | 50 |
| (301) 929-32** | (301) 929-3200 - (301) 929-3299 | 53 |
| (301) 929-33** | (301) 929-3302 - (301) 929-3399 | 63 |
| (301) 929-34** | (301) 929-3401 - (301) 929-3499 | 41 |
| (301) 929-35** | (301) 929-3501 - (301) 929-3596 | 47 |
| (301) 929-36** | (301) 929-3600 - (301) 929-3636 | 3 |
US Phone Directory: (301) 929-3***
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