It's far more likely that the 7-11 website is wrong than the USPS website. I tried all combinations of 90 and 10058 in the street address, and Cupertino and San Jose as the city, in their address lookup tool ( https://tools.usps.com/zip-code-lookup.htm?byaddress ), and 10058 + Cupertino was the only one of the four that returned any result.