US government owned postal service for delivery within USA.
https://usps.com
Shipping Providers
Get access to data on 622,178 websites USPS Customers. We know of 294,180 live websites using USPS and an additional 327,998 sites that used USPS historically and 234,225 websites in the United States.
USPS websites that are also using other technologies.
Get a list of 622,178 websites using USPS which includes location information, hosting data, contact details, 294,180 currently live websites and an additional 271,601 domains that redirect to sites in this list. 327,998 sites that used this technology previouslyand 234,225 websites in the United States currently using USPS.
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