What Are International Shipping Zones?

Shipping zones come in two systems. Inside the US, carriers price by numbered zone, which measures how far a package travels from the warehouse to the customer. For international orders there is no zone number to find: carriers assign each destination country to a rate group and price from that. If you sell across borders you will deal with both, and the two scales do not line up with each other.

Domestic zones: USPS Zones 1 through 9

Zone 1 is local, Zone 8 covers the farthest domestic destinations, and Zone 9 is a special case. It applies only to the Freely Associated States: Palau, the Federated States of Micronesia, and the Marshall Islands. Alaska, Hawaii, Puerto Rico, Guam, and the other US territories fall inside Zones 1 through 8 like any other domestic address. From Austin, for example, Hawaii and Puerto Rico are both Zone 8 on the USPS chart effective September 1, 2026. UPS and FedEx use the same idea with their own zone charts built from origin and destination ZIP codes.

International shipping: rate groups by country, not zones

International shipping does not use the domestic scale. USPS sorts the countries it serves into 20 Country Price Groups. Canada is Group 1 and Mexico is Group 2, and at retail those two are the cheapest destinations for a 1 lb Priority Mail International parcel. Past that, the group number is a bucket rather than a ranking: the United Kingdom sits in Group 20 and Spain in Group 4, and a higher number does not always mean a higher price. Across carriers, Canada and Mexico usually sit in the cheapest tiers and remote destinations cost the most, but the only reliable answer is the destination country's line in the carrier's current rate guide.

How carriers set your zone

Zones are calculated from the package's origin, not a fixed national rate. Two orders going to the same customer can price differently if they leave from different warehouses. That is why where your inventory sits matters as much as where your customer is.

Finding your zone

• USPS domestic: open the USPS Domestic Zone Chart and enter your origin ZIP.
• USPS international: look up the destination country in the Country Price Groups table of USPS Notice 123.
• UPS: look up the zone chart on ups.com using your origin and destination ZIP.
• FedEx: enter the destination ZIP in the FedEx zone locator to pull the rate group.

Why zones matter for your costs

Once you know your zones, you can estimate shipping before you quote a customer, set realistic flat-rate or free-shipping thresholds, and spot when warehouse placement is quietly inflating your postage. Shipping from a location central to your customers pulls more orders into lower zones.

Orders received before 12pm CT ship same day from our Austin facility, and postage is built into the per-order price that starts at $7. If you want one number per order instead of a zone chart, talk to us.