| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 927-30** | (301) 927-3000 - (301) 927-3099 | 70 |
| (301) 927-31** | (301) 927-3103 - (301) 927-3198 | 73 |
| (301) 927-32** | (301) 927-3200 - (301) 927-3298 | 69 |
| (301) 927-33** | (301) 927-3301 - (301) 927-3398 | 65 |
| (301) 927-34** | (301) 927-3401 - (301) 927-3499 | 65 |
| (301) 927-35** | (301) 927-3500 - (301) 927-3599 | 76 |
| (301) 927-36** | (301) 927-3600 - (301) 927-3696 | 78 |
| (301) 927-37** | (301) 927-3701 - (301) 927-3799 | 75 |
| (301) 927-38** | (301) 927-3800 - (301) 927-3898 | 62 |
| (301) 927-39** | (301) 927-3900 - (301) 927-3999 | 70 |
US Phone Directory: (301) 927-3***
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