This site maintains a record of adult material.
https://www.law.cornell.edu/uscode/18/usc_sec_18_00002257----000-.html
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Get access to data on 122,550 websites that are Title 18, USC 2257 Customers. We know of 84,955 live websites using Title 18, USC 2257 and an additional 37,595 sites that used Title 18, USC 2257 historically and 58,872 websites in the United States.
Get a list of 122,550 websites using Title 18, USC 2257 which includes location information, hosting data, contact details, 84,955 currently live websites and an additional 111,677 domains that redirect to sites in this list. 37,595 sites that used this technology previously and 58,872 websites in the United States currently using Title 18, USC 2257.
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