other way to reach me. I have 3 teenagers who drive, and an 11year old who does after school activities. Is he allowed to do this?
If there is no divorce pending, no court order preventing him from doing that, and he is on your cell phone contract, then yes, he can.
Go get your own cell phone account without having his name on it. You want that anyway. He's looking at your bill to see who you are calling and texting and apparently is not happy with what he is seeing. You need the privacy of your own account.