| City: | DPO, Armed Forces Europe |
| Timezone: | --%> |
| Local Time: | 8:30:35 PM |
| Population: | No Population Data |
| Area Code: | -- |
| Classification: | Military Only |
| Quick Link: |
APO AE 09731 historically served Canadian Forces Station (CFS) Shelburne in Nova Scotia, Canada. This facility was a joint Canadian-American operation focused on underwater acoustic surveillance during the Cold War era.
CFS Shelburne was part of the Sound Surveillance System (SOSUS), a network of underwater listening stations designed to detect Soviet submarine activity in the North Atlantic. U.S. personnel assigned to the station used this APO address for mail delivery.
The station closed in 1994 following the end of the Cold War and reduced need for extensive submarine tracking. The APO code remains in the USPS system but primarily serves any residual U.S. liaison presence in the area.
Despite being in Canada, this ZIP uses the AE (Armed Forces Europe) designation because Canada is grouped with European theater operations for postal purposes. Mail routes through the Newark International Service Center.

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Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.