| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 515-00** | (301) 515-0000 - (301) 515-0099 | 86 |
| (301) 515-01** | (301) 515-0101 - (301) 515-0199 | 87 |
| (301) 515-02** | (301) 515-0200 - (301) 515-0298 | 91 |
| (301) 515-03** | (301) 515-0300 - (301) 515-0399 | 85 |
| (301) 515-04** | (301) 515-0401 - (301) 515-0499 | 81 |
| (301) 515-05** | (301) 515-0500 - (301) 515-0599 | 87 |
| (301) 515-06** | (301) 515-0600 - (301) 515-0699 | 83 |
| (301) 515-07** | (301) 515-0700 - (301) 515-0799 | 87 |
| (301) 515-08** | (301) 515-0803 - (301) 515-0899 | 78 |
| (301) 515-09** | (301) 515-0900 - (301) 515-0999 | 78 |
US Phone Directory: (301) 515-0***
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