OnTrac parcel delivery company is informing that hackers breached its corporate network and may have accessed personal details belonging to its customers.

The incident was detected on March 23, and an internal investigation revealed that the attacker accessed certain files between March 20 and 22.

Apart from names, it is unclear what type of information was exposed, as the company redacted the data elements in the notification sample shared with authorities.

OnTrac is a private American parcel-delivery company specializing in “last-mile” e-commerce deliveries, formed in 2021 from the merger of OnTrac Logistics and LaserShip.

The firm operates at 102 locations across 35 states, covering roughly 70% of the U.S. population, and working with more than 7,000 independent delivery contractors.