| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 292-30** | (301) 292-3000 - (301) 292-3099 | 79 |
| (301) 292-31** | (301) 292-3100 - (301) 292-3199 | 84 |
| (301) 292-32** | (301) 292-3201 - (301) 292-3299 | 84 |
| (301) 292-33** | (301) 292-3300 - (301) 292-3399 | 76 |
| (301) 292-34** | (301) 292-3400 - (301) 292-3499 | 80 |
| (301) 292-35** | (301) 292-3501 - (301) 292-3599 | 78 |
| (301) 292-36** | (301) 292-3600 - (301) 292-3699 | 76 |
| (301) 292-37** | (301) 292-3700 - (301) 292-3798 | 73 |
| (301) 292-38** | (301) 292-3802 - (301) 292-3899 | 79 |
| (301) 292-39** | (301) 292-3900 - (301) 292-3997 | 74 |
US Phone Directory: (301) 292-3***
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