This is the craziest story I have ever heard of... this is the MS Society in Denver that has hired a telemarketing company to make calls for them. They call on multiple numbers, each time you block one another one pops up. I called the MS Society directly to have my phone number removed. The sad story is I do contribute and have relatives that have MS. But to call at all hours of the day and night and hang up. Really not cool. And to use a telemarketer...really NOT cool.
To date, I have received 7 calls from this number with Caller ID showing Denver CO. Have also received numerous calls from two other Denver numbers, one of which was at 8:12 a.m. Never leaves a message. Per George's comments above, this is a telemarketer for the MS Society. That's probably correct, as I also donate to them because our daughter has MS. This is really beginning to bother me and I will be reporting them to the FTC. I don't care if they are a charity. They are a nuisance and are not permitted to call before 9:00 a.m.