Area Codes > 557 > Central Office Codes
| Exchange | Rate Center | State | Operating Company |
|---|---|---|---|
| 557-211 | MO | ||
| 557-311 | MO | ||
| 557-314 | MO | ||
| 557-411 | MO | ||
| 557-511 | MO | ||
| 557-555 | MO | ||
| 557-557 | MO | ||
| 557-611 | MO | ||
| 557-700 | MO | ||
| 557-711 | MO | ||
| 557-811 | MO | ||
| 557-911 | MO | ||
| 557-950 | MO | ||
| 557-958 | MO | ||
| 557-959 | MO | ||
| 557-976 | MO |