| Zip Code | Primary City | Secondary City |
| 21660 | Ridgely | |
| 21681 | Ridgely | Nationwide Fulfill Systems |
| 21682 | Ridgely | Nationwide Fulfill Systems |
| 21683 | Ridgely | Nationwide Fulfill Systems |
| 21684 | Ridgely | Nationwide Fulfill Systems |
| 21685 | Ridgely | Nationwide Fulfill Systems |
| 21686 | Ridgely | Nationwide Fulfill Systems |
| 21687 | Ridgely | Nationwide Fulfill Systems |
| 21688 | Ridgely | Nationwide Fulfill Systems |