I just called my local Verizon store. They are in fact having employees make spammy phone calls from this number. I'm guessing this # is an employee's number forced to do this.
i get these every couiple of months since i bought my iphone through a verizon store. they give you a code to use next time you are in for like 20-30% off things. it is legit. I got $30 waived for the activation fee on my new phone, and then 20% off my new iphone in the same visit. the number is actually coming from a call center that they had set up to make the calls for each location
I used to work for the company that does this. The company that owns the stores that are doing this is called blue mobile solutions shaddy company. Steer clear. Owner has a serious criminal record. They like to tell half truiths to get sales rather then just doing what is best for the costumer.