US government owned postal service for delivery within USA.
https://usps.com
Shipping Providers
Get access to data on 664,300 websites that are USPS Customers. We know of 160,238 live websites using USPS and an additional 504,062 sites that used USPS historically and 130,785 websites in the United States.
USPS websites that are also using other technologies.
Get a list of 664,300 websites using USPS which includes location information, hosting data, contact details, 160,238 currently live websites and an additional 214,114 domains that redirect to sites in this list. 504,062 sites that used this technology previouslyand 130,785 websites in the United States currently using USPS.
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