When someone calls your Google number, you can choose to have the caller's number or your Google number displayed on your phone's caller ID.
Select the Calls tab in your Google Voice Settings, and then click the radio button next to either Display caller's number or Display my Google number. If you select the second option, you'll know that the caller dialed your Google number.
Megan is a Google Voice expert and author of this help page. Help her improve this article by leaving feedback below.