Updating previous post from 10/24.
Called dp&l customer service today. They confirmed the phone call came from dp&l cs. Confirmed the information was accurate and the 937-331-3900 is dp&l customer service phone number. Can assure you now it's a legit number.
Call type: Event reminder
DP&L automatic system. Informing of an inspection comming soon. Conducted by a sub-contractor named Osmos. Could involved digging and physical inspection. Such event is to warrant and/or improve the quality of the service. Also provided a web site but was unable to get it. Can't assure it's legit or not.
dp and l