Roundabout Theatre Company in NY. After ignoring the call, I called the number back during the middle of the night so I would get a recording the hear who it was. Evidently this "theater" company got my cell number somehow and I think it's BS that they're randomly calling me. I'm afraid to answer the call to tell them to stop calling because then they'll know my number is good and they'll sell it, I'm sure. Much like 'unsubscribing' from a spam email.
Roundabout Theatre Company is pretty harmless. You probably purchased tickets to one of their shows through Telecharge, and now they're calling to sell you a subscription. Usually, if you pick up and just tell them that you're not interested, they'll stop calling you.
Roundabout Theater NEVER stops calling you! Once you have taken a subscription they hound you mercilessly. For one solid year I have been asking them to remove my name and phone number from their solicitations. STILL, I regularly get calls from them and am ready to register a complaint with the Better Business Bureau. Time and again I have been assured that my name will be removed, yet for a full year, I have been hounded by this organization. Stop already!
The report from Mary C. is correct. Roundabout still calls me despite that I request to be removed from their list. Specifically, I request to be put on their "Do Not Call" list. But they still call. When I find out who to complain to, I'll provide copies of my cell bill to prove their calls.