USPS uses the term "zones" to describe the distance a domestic shipment must travel.
Zones range from Zone 1 (local) to Zone 9 (very far away). A zone is determined by the "ship from" zip code as it relates to the "ship to" zip code. The farther a package must travel, the more zones it crosses, and the more it costs to ship it.
Finding the Zone for a USPS Shipment
The first 3 digits of your destination ZIP Code determine the zone, which is what is used if you are shipping locally. If you are shipping non-local, the zone is determined by how many zones a package crosses to arrive at the destination. You can look up the zone for you shipment using the USPS Zone lookup tool.
Zone-Based USPS Services
Zones only apply to USPS domestic services. If a service is selected that relies on weight or dimensions to determine the rate, then the zone will also factor into the postage cost.
- Priority Mail: See USPS rate tables for Priority Mail to determine shipping cost between zones.
- Priority Mail Express: See USPS rate tables for Priority Mail Express to determine shipping cost between zones.
- Priority Mail Regional Rate: Zoned service that uses different packages to save you money. Learn more about Regional Rate.
- First-Class Package Service: Available only for packages less than 1 lb. See USPS rate tables for First-Class Package Service to determine shipping cost between zones.
USPS Services Exempt from Zones
Some USPS domestic services are exempt from zone-based pricing.
- Flat Rate package types: Available for packages up to 70 lbs. Learn more about USPS Flat Rate package rates.