US government owned postal service for delivery within USA.
https://usps.com
Shipping Providers
Get access to data on 694,455 websites that are USPS Customers. We know of 184,993 live websites using USPS and an additional 509,462 sites that used USPS historically and 145,207 websites in the United States.
USPS websites that are also using other technologies.
Get a list of 694,455 websites using USPS which includes location information, hosting data, contact details, 184,993 currently live websites and an additional 227,374 domains that redirect to sites in this list. 509,462 sites that used this technology previouslyand 145,207 websites in the United States currently using USPS.
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