The CODE-1 Plus database contains virtually every house number range in the U.S. CODE-1 Plus ensures that your addresses are correct and in the USPS-specified format. Optionally, CODE-1 Plus stores match results and return codes relating to each input address. These include match results for the following:
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ZIP Codes
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ZIP + 4 Codes
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Carrier route codes
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Standardized address line and/or elements
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City names and state abbreviations
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Normalized address lines
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Address match return codes
The return codes help you to flag errors in your input file and allow you to select or reject processed addresses based on your job requirements.