I don't pick up their calls but they are from a legitimate consumer advocacy group called "The NJ Public Interest Research Group". Probably soliciting donations.
This number has called me several times unwantedly.
I receive calls from this # on my cell phone several times a week; in fact, I've had 12 calls from this # since November 21st. No one was there when I answered, so I added it to my Black List on my Call Blocker app.
Called my Google Voice number, did not leave a message. This is the second time they've called and left no message; the first was several weeks ago.