Area Code 303 — Carriers, Line Types & Portability
Carrier breakdown and line-type data for area code 303 (CO), across 521 analyzed numbers. Useful for bulk-validating 303 calling lists and spotting VoIP/ported numbers before you dial or text.
Carriers in area code 303
| Carrier | Numbers analyzed |
|---|---|
| Verizon Wireless | 245 |
| AT&T | 140 |
| T-Mobile | 132 |
| Bandwidth.com | 2 |
| CenturyLink | 2 |
Line types in 303
| Line type | Numbers analyzed |
|---|---|
| WIRELESS | 517 |
| CLEC | 2 |
| RBOC | 2 |
Top rate centers
| Rate center | Numbers analyzed |
|---|---|
| DENVER | 474 |
| FORTLUPTON | 30 |
| LONGMONT | 17 |
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