Why Can’t I Get a Google Voice Number?

Google uses your personal mobile telephone number as a one-time-use “claim ticket” to keep track of eligibility. Once that number has been used by anyone, to claim a Google Voice number, it can’t be used again for many months. Removing your personal number from some other Google account does not “reset” or otherwise allow you to claim a Google Voice number. Deleting a Google Voice number or …

 https://support.google.com/voice/community-guide/241024325/why-can-t-i-get-a-google-voice-number?hl=en