| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 299-60** | (240) 299-6005 - (240) 299-6080 | 5 |
| (240) 299-61** | (240) 299-6108 - (240) 299-6175 | 4 |
| (240) 299-62** | (240) 299-6208 - (240) 299-6299 | 10 |
| (240) 299-63** | (240) 299-6335 - (240) 299-6387 | 7 |
| (240) 299-64** | (240) 299-6402 - (240) 299-6478 | 3 |
| (240) 299-65** | (240) 299-6505 - (240) 299-6505 | 1 |
| (240) 299-66** | (240) 299-6620 - (240) 299-6678 | 3 |
| (240) 299-67** | (240) 299-6706 - (240) 299-6789 | 4 |
| (240) 299-68** | (240) 299-6806 - (240) 299-6888 | 5 |
| (240) 299-69** | (240) 299-6939 - (240) 299-6979 | 3 |
US Phone Directory: (240) 299-6***
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