| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 318-20** | (240) 318-2000 - (240) 318-2099 | 66 |
| (240) 318-21** | (240) 318-2100 - (240) 318-2199 | 79 |
| (240) 318-22** | (240) 318-2201 - (240) 318-2299 | 82 |
| (240) 318-23** | (240) 318-2301 - (240) 318-2399 | 80 |
| (240) 318-24** | (240) 318-2400 - (240) 318-2499 | 81 |
| (240) 318-25** | (240) 318-2500 - (240) 318-2599 | 76 |
| (240) 318-26** | (240) 318-2602 - (240) 318-2699 | 70 |
| (240) 318-27** | (240) 318-2700 - (240) 318-2799 | 76 |
| (240) 318-28** | (240) 318-2800 - (240) 318-2899 | 56 |
| (240) 318-29** | (240) 318-2904 - (240) 318-2999 | 63 |
US Phone Directory: (240) 318-2***
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