| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 229-00** | (301) 229-0000 - (301) 229-0099 | 73 |
| (301) 229-01** | (301) 229-0100 - (301) 229-0199 | 80 |
| (301) 229-02** | (301) 229-0200 - (301) 229-0299 | 75 |
| (301) 229-03** | (301) 229-0300 - (301) 229-0398 | 79 |
| (301) 229-04** | (301) 229-0400 - (301) 229-0499 | 77 |
| (301) 229-05** | (301) 229-0503 - (301) 229-0599 | 82 |
| (301) 229-06** | (301) 229-0600 - (301) 229-0699 | 71 |
| (301) 229-07** | (301) 229-0701 - (301) 229-0799 | 77 |
| (301) 229-08** | (301) 229-0800 - (301) 229-0899 | 70 |
| (301) 229-09** | (301) 229-0900 - (301) 229-0999 | 67 |
US Phone Directory: (301) 229-0***
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