have you been getting calls from this number too?

Call comes in, all I get is dead air.

It's SFI and independent research company. I called them back using *67 to block my number.

this number just called my job and requested to speak with the office manager. I told her there is no such person (we're a small business so we don't have one) but could I please take a message. the lady said no and hung up on me.

Wants to talk to an adult in the house.  Ha Ha.