| Start Date | 03/25/2001 |
| Current Time in Area Code 563 | 563> CST |
| Timezone | Central Standard Time |
| Regional Market Area | Cedar Rapids-Waterloo-Iowa City and Dubuque Area Davenport-Rock Island-Moline Area Rochester-Mason City-Austin Area |
| Metro Area(s) | Clinton, IA Dubuque, IA Muscatine, IA |
| Population (2020) | 519906 |
| Adjacent Area Codes | 309,319,507,608,641,779,815 |
| Allamakee County |
| Cedar County |
| Clayton County |
| Clinton County |
| Delaware County |
| Dubuque County |
| Fayette County |
| Howard County |
| Jackson County |
| Jones County |
| Muscatine County |
| Scott County |
| Winneshiek County |
| Bettendorf |
| Davenport |
| Dubuque |