| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 630-00** | (301) 630-0000 - (301) 630-0099 | 69 |
| (301) 630-01** | (301) 630-0101 - (301) 630-0199 | 71 |
| (301) 630-02** | (301) 630-0201 - (301) 630-0299 | 57 |
| (301) 630-03** | (301) 630-0301 - (301) 630-0399 | 74 |
| (301) 630-04** | (301) 630-0401 - (301) 630-0496 | 64 |
| (301) 630-05** | (301) 630-0501 - (301) 630-0598 | 69 |
| (301) 630-06** | (301) 630-0601 - (301) 630-0699 | 69 |
| (301) 630-07** | (301) 630-0701 - (301) 630-0797 | 73 |
| (301) 630-08** | (301) 630-0800 - (301) 630-0898 | 77 |
| (301) 630-09** | (301) 630-0900 - (301) 630-0996 | 59 |
US Phone Directory: (301) 630-0***
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