Same thing, although my phone call was from 213-337-2559 - they wouldn't give me time to discuss the offer with my spouse and said it was a "live" offer. They did have my IHG rewards number and point balance, so it seems like they are legitimately connected with them somehow. I didn't bite but did keep them on the phone for 20 minutes.
Received two calls this week from this number, did not answer and they did not leave a message. When I called back, I reached a recording that identified the business as IHG (hotel reward program).
Got a call, said IHG rewards and asked me to take a brief survey. After that they transferred me to another line and said they would offer a bonus vacation package of 4 days and 3 nights. They asked me for my CC# to charge for $249 for a vacation package in Las Vegas. Haha, he thought I was dumb. Stupid AIHG programs with their silly tricks. I am about to ditch the hotel after I use up my points for free vacation, LOL!