The numbers you see on your debit card represent the debit card number. Although the bank connects your debit card number to your account number, they are not interchangeable.

Visa, in its response last year, argued that the Justice Department cherry-picked its definition of the online debit-card market to make it seem like the network holds more power than it does.

The practice has resulted in only 6 percent of online debit card transactions being processed over competing networks, according to the Fed.

The FTC is examining whether the companies’ security tokens prevent online debit-card payments from going over other networks.

The credit card giants are already being probed by the Commission for allegedly blocking merchants from routing payments over other debit card networks, the report said.

Visa and Mastercard are being investigated by the Federal Trade Commission over their methods of routing digital transactions involving security tokens.

The U.S. Federal Trade Commission is investigating whether Visa Inc and Mastercard Inc's security tokens restrict debit card routing competition on online payments, the Wall Street Journal ...