| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 924-70** | (301) 924-7000 - (301) 924-7089 | 24 |
| (301) 924-71** | (301) 924-7100 - (301) 924-7198 | 36 |
| (301) 924-72** | (301) 924-7200 - (301) 924-7285 | 20 |
| (301) 924-73** | (301) 924-7300 - (301) 924-7396 | 19 |
| (301) 924-74** | (301) 924-7400 - (301) 924-7496 | 35 |
| (301) 924-75** | (301) 924-7527 - (301) 924-7527 | 1 |
| (301) 924-76** | (301) 924-7624 - (301) 924-7678 | 2 |
| (301) 924-78** | (301) 924-7800 - (301) 924-7800 | 1 |
US Phone Directory: (301) 924-7***
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