This number has called my cell phone about 4-5 times in the past 2 weeks. No idea who they are or what they want but I am getting many spam phone calls from the greater Greenwich CT area, which is area code (203) and includes the 542 and 504 prefixes, so i have no reason to believe this is anything but some crap telestalking calls just like the rest of them I get from those prefixes. I combat these numbers by adding them to my contacts under the name "spam" and then assign contact "spam" a ringtone of 10 seconds of silence. So after they call once, they get added to "spam" and then if they ever call again, I never hear the phone ring again. But I still know how many times they call because they still appear in my call history as missed calls. I'm fully expecting to see this number and others like it littering my call history many more times in the near future, but at least they can't disturb me anymore after the first time.