| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 631-20** | (240) 631-2000 - (240) 631-2099 | 52 |
| (240) 631-21** | (240) 631-2100 - (240) 631-2199 | 54 |
| (240) 631-22** | (240) 631-2200 - (240) 631-2299 | 73 |
| (240) 631-23** | (240) 631-2301 - (240) 631-2399 | 47 |
| (240) 631-24** | (240) 631-2400 - (240) 631-2499 | 49 |
| (240) 631-25** | (240) 631-2500 - (240) 631-2599 | 62 |
| (240) 631-26** | (240) 631-2600 - (240) 631-2698 | 65 |
| (240) 631-27** | (240) 631-2700 - (240) 631-2799 | 65 |
| (240) 631-28** | (240) 631-2800 - (240) 631-2899 | 60 |
| (240) 631-29** | (240) 631-2900 - (240) 631-2999 | 59 |
US Phone Directory: (240) 631-2***
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