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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.

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.

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.

Verify email address online using free email verification tool.

Professional search tool to find and investigate people and businesses, research phone numbers and addresses

Our contact data quality solutions deliver point-of-entry address validation, integrated batch updates, advanced duplicate management and reduced postage.

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Möglichkeiten der Adressbereinigung mit AddressDoctor, dem anerkannten Experten für Adressprüfung, Adresskorrektur und Dublettenabgleich.

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Visit the official home page for Windows. Find help, purchasing info, and downloads for Windows 7, Internet Explorer, and other Windows products.