Find the zip+4 for an address or what zip codes exist for a City.
Find Official USPS State Abbreviations
Find Official USPS Suffix Abbreviations
Find Official USPS Unit Designation Abbreviations
Find First Class Postage Rates up to 13 ounces for post cards, letters, and large envelopes
Domestic and International Package Rate Calculator (More than 13 ounces)
National Customer Service Center (NCSC)
You can contact NCSC at (800) 238-3150 for answers to your USPS questions.
Address N’ Mail uses a sophisticated system that permits the processing of a wide array of customer needs. This includes ability to handle secure electronic data transfer from our customers, list cleansing, merge and purge, National Change of Address, mail merge, invoice production, and much more. In-house printing of cards, flyers, brochures, and booklets is available in black and white or high quality color.