Can't assure you it's a legit number or not. Can't assure it's legit intentions neither but was an automatic system who identified the caller as DP&L, informing a sub-contractor named Osmos will be conducting an inspection of the power lines soon. Such could involved physical inspection and/or digging. Such event is to warrant and/or improve the quality of the service. Also provided a web site but was unable to get it.
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.
It's Dayton Power & Light. They will sometimes call and leave automated messages if power had been out and it has been restored or if they're going to be in your area doing tree trimming near power lines