| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 764-80** | (240) 764-8000 - (240) 764-8099 | 81 |
| (240) 764-81** | (240) 764-8102 - (240) 764-8199 | 80 |
| (240) 764-82** | (240) 764-8200 - (240) 764-8299 | 76 |
| (240) 764-83** | (240) 764-8301 - (240) 764-8399 | 81 |
| (240) 764-84** | (240) 764-8400 - (240) 764-8499 | 85 |
| (240) 764-85** | (240) 764-8500 - (240) 764-8599 | 78 |
| (240) 764-86** | (240) 764-8600 - (240) 764-8699 | 78 |
| (240) 764-87** | (240) 764-8700 - (240) 764-8799 | 79 |
| (240) 764-88** | (240) 764-8801 - (240) 764-8899 | 70 |
| (240) 764-89** | (240) 764-8901 - (240) 764-8998 | 69 |
US Phone Directory: (240) 764-8***
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