diners credit card phone number
Diners Club Credit Card Customer Service: The Diners Club credit card customer service number is 1-800-2-DINERS, or 1-514-881-3735 for calling outside the US. Diners Club. Diners Club was the first ever credit card organization, started by the businessman Frank McNamara in 1949 after an unfortunate incident where he found himself unable to pay for his dining bill.