Website address: https://crest.com/en-us
Phone Number: 1-800-492-7378
Email/contact form: https://crest.com/en-us/contact-us
Facebook page: https://www.facebook.com/crest/
Twitter account: https://twitter.com/Crest
Mailing address: The Proctor and Gamble Company, Attn: Crest, 1 P&G Plaza Cincinnati, Ohio 45202