Well, anything's "hackable", so there are never any guarantees. But, no, Google does not publish anything linking your Gmail address to your Google Voice phone number, unless you enable sharing it yourself.2019-03-15
Can you look up who owns a Google Voice number?
Google Voice numbers aren't publicly listed or linked to the owner's physical address; they're only connected to an online account. Thus, you won't find them in print or online phone books, making them generally difficult to trace.2021-09-29
Are Google Voice numbers Anonymous?
Hide your caller ID for all calls Important: When you hide your caller ID on one device, it's hidden on all devices with the same Google Voice account. On your computer, open Google Voice. Sign in with the Google Account that you used to register your number.
Is a Google Voice number Anonymous?
Your Google Voice phone number helps you make and receive calls and send and get text messages. You can hide your caller ID when you make calls on Google Voice. You can also change the caller ID for incoming calls. If you ever lose access to Google Voice, your phone number helps with account recovery.