The Atlanta Journal-Constitution reports the unauthorized access extends to customers beyond Georgia, but the Ohio-based insurer declined to say how many clients elsewhere have been affected and in how many other states.
The company is “not aware of any misuse of personal information at this time,” a Nationwide spokeswoman said in an e-mail statement.
The FBI and other law enforcement agencies are investigating, the spokeswoman told the newspaper.
The company did not disclose whether information was actually stolen or merely viewed by the perpetrators, but labeled the breach a criminal act.
Georgia Insurance Commissioner Ralph Hudgens said that Nationwide informed his office that names, drivers license numbers, dates of birth and marital statuses were among the other pieces of sensitive data accessed.
The breach affected not only Nationwide policy holders but also the personal information of applicants for Nationwide services.
Nationwide is among the largest automotive and property insurers in the U.S. The company also provides mortgages and other financial services.