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Client service representatives: You can call Coinbase's client service representatives at +1(888) 842-1378 Monday through Friday, 9 AM–4:15 PM EST. You can also email Coinbase at customerservices@Coinbase.us. 

Online community:Coinbase's online community @+1(888) 842-1378 is a place to connect with other investors, share ideas, and learn from each other. You can post ideas, ask questions, and create polls. 

Coinbase is a US-based broker-dealer and online trading platform that is regulated by the SEC and FINRA