Cookie consent
We use some essential cookies to make this website work. We'd like to set additional cookies to help us measure your experience when you view and interact with the website.
The ZIP+4 database provides access to 67.5 million delivery point addresses
Over 20 million business addresses are included within the ZIP+4 database
The USPS update their data every two months with new and updated addresses
5-digit ZIP codes were introduced in the USA by the United States Postal States (USPS) in 1963. ZIP is short for Zone Improvement Plan. In 1983, the USPS rolled out ZIP+4 codes with four extra digits to designate more specific locations.
An ZIP+4 is a 9-digit code split into two parts:
The national area representing a group of US states
The region or large city within the national area
The area of the city, town or village
The sector or several blocks
The segment or one side of a street
| PRESIDENT | Recipient name |
| 1600 PENNSYLVANIA | Street address |
| WASHINGTON DC 20500-0001 | Town State ZIP+4 code |
Postcoder is hosted on a leading cloud platform in the UK and Ireland, and is supported by our friendly team of addressing specialists.
"It took us under a day to swap out our old system with Postcoder and we have been enjoying it ever since."
"We've been really pleased with the uptime and reliability of the service."
