"""Called early in the morning, hung up after a couple of rings. No message. When I called back I got a recording saying that they're Comnet Marketing Group, a telemarketer who specializes in membership renewals. They say that you can be removed from their list by leaving a message with your name and phone number. I figured there's no harm in trying, since they already have my number and aren't shy about calling."""

Exact same thing happened to me. They have called me every morning for the past week. I blocked their number in addition to having them take my name off of their calling list.  

I have received a call from this number around the same time for the past 8 days.

I have been receiving calls from this number on a daily basis.  I set my phone to auto-reject it and I had a 5-second voicemail today because the woman thought I picked up, but she hung up when she realized it was a voicemail.  

They called again this morning. I picked the phone up after the first ring, and they hung up on me >:(

Called early in the morning, hung up after a couple of rings. No message. When I called back I got a recording saying that they're Comnet Marketing Group, a telemarketer who specializes in membership renewals. They say that you can be removed from their list by leaving a message with your name and phone number. I figured there's no harm in trying, since they already have my number and aren't shy about calling.

Same here, called twice in a row now no message

calling my work number just about every day and never leaving a message.

No message, called every day this week, same time.

left no message. Has called 2x.