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I'm attempting to manually enter a card number (mastercard) into my POS app. The card number has 16 digits. The POS app wants me to enter 18 numbers before it will move on. What gives? This has happened before. It would be nice to have pics in the article showing how this is done.
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1 REPLY 1
16 digits is correct and MasterCard numbers must start with 50...., 51...., 52...., 53...., 54...., 55.... OR new in 2017 in the range of the first 6 digits 222100-272099.