| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 430-00** | (301) 430-0000 - (301) 430-0097 | 81 |
| (301) 430-01** | (301) 430-0100 - (301) 430-0199 | 74 |
| (301) 430-02** | (301) 430-0200 - (301) 430-0299 | 77 |
| (301) 430-03** | (301) 430-0300 - (301) 430-0399 | 79 |
| (301) 430-04** | (301) 430-0403 - (301) 430-0483 | 6 |
| (301) 430-05** | (301) 430-0514 - (301) 430-0590 | 8 |
| (301) 430-06** | (301) 430-0600 - (301) 430-0699 | 79 |
| (301) 430-07** | (301) 430-0700 - (301) 430-0799 | 70 |
| (301) 430-08** | (301) 430-0800 - (301) 430-0899 | 74 |
| (301) 430-09** | (301) 430-0900 - (301) 430-0999 | 75 |
US Phone Directory: (301) 430-0***
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