FYI I have a 234 542 XXXX number that I got from Vonage in the last 45 days.
Coincidentally I too got a similar call from numbers in this area code and prefix (Ohio). I believe this to be newer number. Perhaps you can complain to Vonage.
I got the _SAME_ thing from this number.. It was strange, it called back about 4 times, never spoke, never said ANYTHING.. It almost seemed that the call disconnected as soon as I did.. Either a bored kid or some kind of automation..
Got a call from this number. It only rang once, & they hung up. Looked on www.fonefinder.net. It's the new area code for Akron, OH. I called it back & it said "We cannot complete your call as dialed".