How to Change Contact Number in Coinbase Account? - posted in Ask An Andrologist: To speak to a Coinbase agent, call their customer support phone number at + @ +1-(833)-224 9242 [Talk to Human] or +1(833)-224–9242. Follow the automated prompts and choose the option to speak with a representative. You can do this by saying “Agent” or pressing ‘0’ during the call to be connected to an agent who can assist you.