Area Code 603 — Carriers, Line Types & Portability
Carrier breakdown and line-type data for area code 603 (NH), across 702 analyzed numbers. Useful for bulk-validating 603 calling lists and spotting VoIP/ported numbers before you dial or text.
Carriers in area code 603
| Carrier | Numbers analyzed |
|---|---|
| Verizon Wireless | 450 |
| AT&T | 113 |
| T-Mobile | 100 |
| U.S. Cellular | 31 |
| TELNYX | 3 |
| Comcast | 2 |
| Neutral Tandem | 1 |
| Bandwidth.com | 1 |
Line types in 603
| Line type | Numbers analyzed |
|---|---|
| WIRELESS | 594 |
| PCS | 100 |
| IPES | 5 |
| CLEC | 2 |
Top rate centers
| Rate center | Numbers analyzed |
|---|---|
| MANCHESTER | 80 |
| DERRY | 68 |
| CONCORD | 60 |
| NASHUA | 59 |
| PORTSMOUTH | 54 |
| DOVER | 44 |
| MERRIMACK | 34 |
| LACONIA | 30 |
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