| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 977-80** | (301) 977-8000 - (301) 977-8099 | 84 |
| (301) 977-81** | (301) 977-8100 - (301) 977-8199 | 82 |
| (301) 977-82** | (301) 977-8200 - (301) 977-8299 | 76 |
| (301) 977-83** | (301) 977-8300 - (301) 977-8399 | 74 |
| (301) 977-84** | (301) 977-8400 - (301) 977-8499 | 83 |
| (301) 977-85** | (301) 977-8500 - (301) 977-8599 | 74 |
| (301) 977-86** | (301) 977-8600 - (301) 977-8698 | 78 |
| (301) 977-87** | (301) 977-8701 - (301) 977-8799 | 85 |
| (301) 977-88** | (301) 977-8800 - (301) 977-8899 | 83 |
| (301) 977-89** | (301) 977-8900 - (301) 977-8999 | 74 |
US Phone Directory: (301) 977-8***
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