| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|
| 53 | Warri | Delta State | 536,023 | Nigeria | Africa/Lagos |
| 54 | Sapele, Delta | Delta State | 161,686 | Nigeria | Africa/Lagos |
| 55 | Agbor | Delta State | — | Nigeria | Africa/Lagos |
| 56 | Asaba City | Delta State | 73,374 | Nigeria | Africa/Lagos |