DELAFIELD — WI
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BANDWIDTH.COM CLEC, LLC - WI | 007F | 1 |
| BRIGHTSPEED OF WESTERN WISCONSIN, LLC | 0922 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| TWC IP ENABLED SERVICES, LLC | 793K | 1 |