Yes, I am another one getting a lot of calls from this [***]. Never respond. I can see the number being called from and if it begins with 636 (they have various numbers they use, in case people block certain numbers they can just switch to another), I don't answer. I have not answered them for at least the last ten calls. I will never answer a 636 number again that I don't know.
I actually contacted the Delta OutSource Group about this and they said their number is being spoofed by scammers trying to get credit card info, etc. But if this is true, then why would the caller hang up every single time instead of asking me for information? What good would it do just to call and then hang up? I don't know but suspect that they just want to verify that there is a live person associated with the phone number, to be used for some other purpose. Anyone have any theories about that?