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MAR Address Standards

Published by City of Washington, DC | District of Columbia | Metadata Last Checked: January 27, 2026 | Last Modified: 2025-07-15T18:34:45.000Z
This Address Standards document has been developed to describe the addressing standards used for the Master Address Repository (MAR). The MAR is DC Government’s official address database and is widely used across the City of Washington, DC. The OCTO Data Team which is part of the Office of the Chief Technology Officer (OCTO), is responsible for maintaining the MAR.

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