Delivery Sequence File (DSF)

A computerized file that contains all delivery point addresses serviced by the USPS, except general delivery addresses. Each record contains the ZIP+4 code, carrier route code (CRRT), delivery sequence, delivery type (e.g., business, residence, seasonal, vacancy, etc.), and seasonal delivery information.

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Address Verification Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore.
Geocoding Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore.
Identity Verification Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore.