Any way to do this? Via online of course, in case she is deleting texts off her phone.
You can only view phone numbers that have been messaged & cell numbers that messaged her. See this link below too:
I believe you can see what numbers she has been texting and what numbers have been texting you, I had to do this once and called Verizon and they helped me figure it out...if I recall correctly. Verizon is so helpful when it comes to their customers, and if you are the main account holder (i.e., paying the bill), then you have access to her back up assistant phone information at the very least. If she is underage it is your right and responsibility to protect her, even if it is from herself, so I congratulate you for being a parent, not a buddy! Good job, and good luck.