MT VERNON — WA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4423 | 19 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | 8 |
| T-MOBILE USA, INC. | 6529 | 6 |
| ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | 5 |
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 3 |