| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 977-90** | (301) 977-9000 - (301) 977-9099 | 80 |
| (301) 977-91** | (301) 977-9100 - (301) 977-9198 | 83 |
| (301) 977-92** | (301) 977-9200 - (301) 977-9299 | 76 |
| (301) 977-93** | (301) 977-9300 - (301) 977-9399 | 77 |
| (301) 977-94** | (301) 977-9400 - (301) 977-9498 | 76 |
| (301) 977-95** | (301) 977-9501 - (301) 977-9599 | 82 |
| (301) 977-96** | (301) 977-9600 - (301) 977-9699 | 69 |
| (301) 977-97** | (301) 977-9700 - (301) 977-9797 | 51 |
| (301) 977-98** | (301) 977-9803 - (301) 977-9899 | 51 |
| (301) 977-99** | (301) 977-9993 - (301) 977-9993 | 1 |
US Phone Directory: (301) 977-9***
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