| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 856-60** | (301) 856-6000 - (301) 856-6099 | 53 |
| (301) 856-61** | (301) 856-6170 - (301) 856-6197 | 12 |
| (301) 856-62** | (301) 856-6201 - (301) 856-6299 | 48 |
| (301) 856-63** | (301) 856-6308 - (301) 856-6335 | 11 |
| (301) 856-64** | (301) 856-6400 - (301) 856-6495 | 51 |
| (301) 856-65** | (301) 856-6500 - (301) 856-6599 | 34 |
| (301) 856-66** | (301) 856-6600 - (301) 856-6698 | 14 |
| (301) 856-67** | (301) 856-6701 - (301) 856-6795 | 57 |
| (301) 856-68** | (301) 856-6800 - (301) 856-6897 | 52 |
| (301) 856-69** | (301) 856-6900 - (301) 856-6995 | 53 |
US Phone Directory: (301) 856-6***
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