Blockchain Customer Service — Com Number | Call Now +1(9O9)–516–6499 Blockchain , the decentralized app, makes sending and receiving currency seamless. But if you face any issues, learning how to contact Blockchain Wallet customer service is crucial. The Blockchain Customer Service phone number is 1–909–516–6499. You can also write about your Blockchain issues at #. Otherwise, you can submit a ticket on the Support page of the app. There is also a dedicated FAQ (frequently asked questions) section on the support page. It has answers to common issues that users face.