I have an app on my Android phone called Calls Blacklist. I whitelisted my contacts and block everything else. It blocks calls coming in on my mobile number, but I also have a Google Voice number that it doesn’t block calls for. Weird thing is that I only seem to get blocked spam calls after placing an outgoing call using the Google Voice app, and the blocked calls are always from the last number I dialed. They try to call at different times for about a week then stop. Could someone have access to my outgoing G-Voice call info? How would I find out if they do?