| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 506-00** | (240) 506-0004 - (240) 506-0093 | 22 |
| (240) 506-01** | (240) 506-0100 - (240) 506-0199 | 22 |
| (240) 506-02** | (240) 506-0202 - (240) 506-0298 | 15 |
| (240) 506-03** | (240) 506-0300 - (240) 506-0397 | 22 |
| (240) 506-04** | (240) 506-0411 - (240) 506-0493 | 17 |
| (240) 506-05** | (240) 506-0500 - (240) 506-0598 | 25 |
| (240) 506-06** | (240) 506-0608 - (240) 506-0692 | 22 |
| (240) 506-07** | (240) 506-0723 - (240) 506-0793 | 18 |
| (240) 506-08** | (240) 506-0810 - (240) 506-0897 | 20 |
| (240) 506-09** | (240) 506-0902 - (240) 506-0999 | 18 |
US Phone Directory: (240) 506-0***
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