| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 780-80** | (301) 780-8000 - (301) 780-8029 | 2 |
| (301) 780-82** | (301) 780-8229 - (301) 780-8229 | 1 |
| (301) 780-83** | (301) 780-8322 - (301) 780-8399 | 43 |
| (301) 780-84** | (301) 780-8400 - (301) 780-8498 | 44 |
| (301) 780-85** | (301) 780-8519 - (301) 780-8599 | 31 |
| (301) 780-86** | (301) 780-8640 - (301) 780-8696 | 30 |
| (301) 780-87** | (301) 780-8700 - (301) 780-8799 | 49 |
| (301) 780-88** | (301) 780-8800 - (301) 780-8899 | 63 |
| (301) 780-89** | (301) 780-8900 - (301) 780-8998 | 62 |
US Phone Directory: (301) 780-8***
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