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Coinbase Customer Service Phone Number 1 888 449 7062 
Coinbase operates the call center for this 1-888 449 7062 phone number 24 hours, 7 days.  The short answer is that you should call on a Friday. This observation and the following section are based on analysis of a sample set of 5,676 calls made in the last 90 days using our free, web-based phone (see above). 
Call when they- and you- are open 
When you use our free AI-powered phone to call and talk, wait on hold, or navigate for you, you can also schedule the call with Coinbase at a time when they are open and when it works for you. We will confirm you are ready before placing the call, just in case. That means you can “set it and forget it” ahead of time. 
Schedule a call with Coinbase