All 19 people in the latest indictment are charged with conspiracy to commit wire and mail fraud. The indictment also charges 15 of the defendants with fraud related to electronic mail.
Most defendants are from the Dallas area. Prosecutors say two are from Canada and eastern Europe. Four defendants are listed as fugitives.
The indictment alleges that from 2003 through mid-2009 the defendants conspired to defraud telecommunications companies, credit reporting agencies and other service providers.
Conviction on the conspiracy charge carries a maximum 30-year prison term and a $1 million fine.