Who called from 2028301693

Second call in a week.  No message, but it's from DC so it's probably a nuisance call of some kind.

Claims to be a non-profit for cancer research, I finally picked up and asked to be removed from calling list and woman obliged, let's see how long this lasts...

Same here.  They keep calling but they don't leave a message.  Nothing makes me not want to answer a phone more than seeing "anonymous" pop up!

Second call in two days ... display showed AICR; we don't answer calls from unknown callers.  And you are right, they do not leave a message

We get calls 7 days a week alternating between 202-830-1693 & 202-830-1733, we never pick up and they never leave a message. Both numbers are blocked but they keep calling.