Mastercard 2-series BINs
From WHMCS Documentation
MasterCard has introduced a new 2-series to their Bank Identification Numbers (BINs). The BIN is the first 6 digits of a credit card number, and issued to identify the card’s issuing institution. Up until now, MasterCard BINs have only been in the 5-series range.
MasterCard began issuing the 2-series BINs in 2017. The range is from 222100 to 272099. The new BIN range is subject to the same rules as the existing MasterCard 5-series BIN range.
WHMCS has all the necessary updates to work with Mastercard 2-series BIN numbers.
As a WHMCS user, all you need to do to ensure your installation is able to process the new credit card numbers successfully is ensure you are running WHMCS 7.0 or later.