Allen zipcode
| City | Allen |
| ZIP Code | 21810 |
| Type | PO Box |
| State Code | MD |
| State | Maryland |
ZIP code of Allen is 21810. This place is located in Maryland state in US. To send any postal service to Allen, you must use 21810 zipcode.
| City | Allen |
| ZIP Code | 21810 |
| Type | PO Box |
| State Code | MD |
| State | Maryland |
ZIP code of Allen is 21810. This place is located in Maryland state in US. To send any postal service to Allen, you must use 21810 zipcode.
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