2022年1月21日 · Go to the USPS website and select the drop-down for Send, then select "Look Up a Zip Code". You can also go directly to it with the following USPS link here. On a mobile device, you can open the same top webpage or link, but instead, tap "ZIP Code (TM) Lookup" in the tic-tac-toe board worth of options towards the top of the page.