| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (203) 378-00** | (203) 378-0000 - (203) 378-0097 | 84 |
| (203) 378-01** | (203) 378-0100 - (203) 378-0199 | 81 |
| (203) 378-02** | (203) 378-0200 - (203) 378-0297 | 74 |
| (203) 378-03** | (203) 378-0300 - (203) 378-0399 | 79 |
| (203) 378-04** | (203) 378-0400 - (203) 378-0499 | 48 |
| (203) 378-05** | (203) 378-0501 - (203) 378-0599 | 70 |
| (203) 378-06** | (203) 378-0600 - (203) 378-0699 | 68 |
| (203) 378-07** | (203) 378-0700 - (203) 378-0798 | 71 |
| (203) 378-08** | (203) 378-0800 - (203) 378-0898 | 76 |
| (203) 378-09** | (203) 378-0900 - (203) 378-0989 | 37 |
US Phone Directory: (203) 378-0***
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