The 1-800 number for GEICO customer service is 1-800-841-3000. This is the best phone number to call for assistance with making a claim, coverage questions, canceling a policy, updating account information, refunding a charge, and other customer service issues. The GEICO call center is open 24 hours a day, 7 days a week, and has employees from New York and California. If you have any questions or need assistance with your insurance policy, you can call this number to speak with a GEICO representative.