The National Information Data Center

Avoid wasted postage and ensure timely receipt of all your outbound mail and overnight deliveries.

The National Information Data Center (NIDC) has published the National ZIP Code® Directory for over 30 years. Now, it’s the only printed version of ZIP Code® directory available. Using data licensed directly from the USPS, our two-volume set features the most complete, up-to-date ZIP information available.

Just Added! Official US Census Bureau State and County Demographic and Economic Profiles. Now you can get quick, easy access to facts about people, business, and geography for the states that you do business in and how it compares to the overall US population.

Due to unprecedented demand the inventory of the 2010 National ZIP Code Directory has sold out.

You can still get most up-to-date zip code information available with
ZIP Code® Correct CD

Get quick, instant, electronic access to accurate zip codes, counties, area codes, cities, and states with the single-user version of the ZIP Code® Correct CD.

Get all the benefits and features of the single-user version for your entire company.

Now it is even easier for you and every member of your team to have quick, instant, electronic access to accurate ZIP Codes® counties, area codes, cities, and states with our National ZIP Code® Correct CD network user version. There are absolutely no user restrictions with our network version.