This number showed up as a missed call on my cell phone. It's definitely a robo scam call. I don't know anyone in Tucson and I've only given my number out to two family members.
I've gotten three calls from this number, none left a message. I finally answered. It's Marriott, with a spammy "free vacation." When I asked to be taken off the list, the phone-center guy was rude and hung up. I've blocked the number.
I also got a call from this # a few mins ago and I ignored it and no message was left. Seems odd that I'm getting a call from a 520 area code when I've never gotten any calls from this area code before. Odd because, I just booked a Kartchner Caverns' tour and they're in the 520 area code so I hope they didn't sell my phone # to anyone else.