Who called from 4169004041

Looks like it was an agent for a non-profit looking for cash.

no calling name identifier
no message left

Four calls in the last 5 days. I haven't answered.

I pick up, identify myself, and they hang up. No idea who they are.

Caller wanted to confirm that I was who my phone was registered to - He hung up when I asked who was calling.  Caller ID only recorded the phone number (Toronto, ON area), company or caller identity was blocked by the caller.