| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 498-30** | (301) 498-3000 - (301) 498-3099 | 67 |
| (301) 498-31** | (301) 498-3101 - (301) 498-3198 | 60 |
| (301) 498-32** | (301) 498-3200 - (301) 498-3299 | 77 |
| (301) 498-33** | (301) 498-3300 - (301) 498-3399 | 75 |
| (301) 498-34** | (301) 498-3402 - (301) 498-3499 | 71 |
| (301) 498-35** | (301) 498-3500 - (301) 498-3599 | 62 |
| (301) 498-36** | (301) 498-3601 - (301) 498-3699 | 69 |
| (301) 498-37** | (301) 498-3700 - (301) 498-3799 | 73 |
| (301) 498-38** | (301) 498-3800 - (301) 498-3899 | 71 |
| (301) 498-39** | (301) 498-3900 - (301) 498-3999 | 74 |
US Phone Directory: (301) 498-3***
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