| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 422-30** | (301) 422-3003 - (301) 422-3086 | 55 |
| (301) 422-31** | (301) 422-3110 - (301) 422-3188 | 43 |
| (301) 422-32** | (301) 422-3210 - (301) 422-3283 | 44 |
| (301) 422-33** | (301) 422-3300 - (301) 422-3399 | 58 |
| (301) 422-34** | (301) 422-3400 - (301) 422-3499 | 60 |
| (301) 422-35** | (301) 422-3505 - (301) 422-3583 | 57 |
| (301) 422-36** | (301) 422-3604 - (301) 422-3688 | 47 |
| (301) 422-37** | (301) 422-3700 - (301) 422-3786 | 59 |
| (301) 422-38** | (301) 422-3805 - (301) 422-3899 | 59 |
| (301) 422-39** | (301) 422-3911 - (301) 422-3999 | 45 |
US Phone Directory: (301) 422-3***
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