HEATKEYS

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.

Accurate and up-to-date ZIP code databases and programs with ZIP code related information such as area code, county, latitude, longitude, MSA, PMSA, FIPS code, time zone, and place FIPS. ZIP code data available for immediate download. All ZIP code da...

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...

Complete data sets on Congress to call, email or fax Members of Congress and much more. Data files that match ZIP codes to congressional districts.

Home page of the United States House of Representatives

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

Aristotle political software for political campaigns, PACs, grassroots advocacy, voter data, FEC compliance reporting, political consulting, campaign management, and constituent management for the US and abroad

Find volunteering opportunities with nonprofit organizations by location and interest area.

A free and open educational resource for faculty, students, and self-learners around the world.

support.sas.com is the location for SAS software users who want to find the answer to a SAS problem, sign up for a training course or users group event, buy a book, or learn more about newer releases of our software.

Find quality service, superior products and helpful advice for all your home improvement needs at Lowe