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Get shipping rates, buy stamps, print postage, track a package, look up a ZIP Code? - Find the mailing products and services you need at USPS.com.

SmartyStreets is the leading mailing list software and address hygiene services provider. We provide on-demand USPS CASS Scrubbing and postal address verification, validation, certification, and standardization services that are CASS-Certified(TM) by...

Address verification from Experian QAS enhances USPS postal address data quality with front-end and back-end data verification software products.

For data quality management tools, mailing software, consumer and residential mailing lists, address verification, and NCOA services, visit MelissaData.com, a leading source of cost effective, direct marketing database solutions.

Intelligent Search has developed one of the fastest online address verification and address validation tools on the market today. Visit our site to find out more about our innovative intelligent search technology products.

Experian Official Site - Check your credit report and credit score, as well as obtain business credit reports and other marketing solutions.

Buy USPS postage online from your PC, easily print postage stamps and shipping labels for all USPS mail classes.

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