The last of 15 defendants in an ATM skimming operation throughout Massachusetts and other states has pleaded guilty in federal court.

Dragos Nelu Hornea, 26, pleaded guilty yesterday in Boston federal court to one count of conspiracy to conduct enterprise affairs through a pattern of racketeering activity and one count of conspiracy to use counterfeit access devices, the U.S. attorney’s office said in a statement.

Hornea, a Romanian national, had been extradited from Germany to Massachusetts in April 2021 after being indicted in May 2017. Dragos Hornea had been indicted with 13 co-defendants in 2017, and another co-defendant was charged in a superseding indictment.

Prosecutors said Hornea was a member of the “Hornea Crew,” led by co-conspirators Constantin Denis Hornea and Ludemis Hornea. Over a period of 18 months, the defendants engaged in an ATM skimming scheme to steal debit card numbers and PINs from bank customers in Massachusetts, Connecticut, South Carolina, Georgia and other locations within the United States. The Massachusetts locations where devices were installed included Amherst, Bellingham, Billerica, Braintree, Chicopee, Quincy, Southwick, Waltham, Weymouth and Whately.

Hornea and the other members of the conspiracy then used the stolen information to clone the victim customers’ debit cards and make unauthorized withdrawals from victim bank accounts at ATMs throughout the United States, the statement said. The skimming activities resulted in hundreds of thousands of dollars in losses.

All 15 defendants have pleaded guilty, and sentences so far have ranged from one year and one day to 65 months in prison. Hornea is scheduled for sentencing on Feb. 3.