Its Über, a taxi company.

None

I called it back with my computer and it is a google voice call number. Someone with a google account is calling ppl with the phone option. But, I don't know why.

It's Uber.  If you put in an app to drive, they are just calling to verify that you gave them a good number.  Just part of their security check.

I have received 2 calls from this number (5/23/14@2:37PM ET) and an hour ago (5/30/14@6:31PM ET). Voicemails say it's Uber (a private car service), thanks for your interest in being a driver, and to upload or email license, registration, proof of insurance. Destination addresses are at uber.com. I have called back both times and left a voicemail for "The Google Subscriber is not available" that they are calling the wrong number and to please remove it from their records.

I don't know if they're just misdialing, not updating their records, or trying some kind of guerrilla recruiting tactic. Even though I don't think this is a phish, I would never put it past criminals to have hooked into a legit company's network to siphon confidential data.

Even though it seems to be from Uber, I caution everyone to NEVER, EVER provide copies of your identity, financial, or insurance documents to anyone unless you are absolutely certain the destination is 100% legit, and that YOU initiated the transaction...not someone calling you out of the blue.