First time they called, no one spoke and they hung up. Second time they called, decided to answer and they asked for owner/manager's name. When I asked what the call was regarding, the lady hung up on me.

They called and immediately asked about our business' address and owner. When I asked what this was regarding they hung up. They called back again and I asked again, they said they were updating the information for the Chamber of Commerce.

They keep calling and hanging up.

The woman on the other end of the phone spoke with a bored tone, and unpleasant attitude. She checked the company name, which I had just said in my greeting, then read off our old address, asking if we were still there. I said not anymore, and who is calling please? She asked for our current address, and I asked again firmly who is calling, and she said she was updating information for the Chamber of Commerce. So I gave her the current address, though when she confirmed, she mispronounced, and the names are not that hard. At the end, she said thank you and hung up.
Weird. Especially since the CID said it was a cell phone number.

Called and left no message, called them back and it hangs up immediately.

One more for the blocked list.