Find previous person w/ certain number

Aug 25, 2018
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I am trying to find out if it is possible to find out the previous person who had a certain phone number (after trying the number it appears it has been changed since the original texts to it were sent and received). This may be too personal but I don’t care...I came across texts sent and received from a number on my fiancé’s phone that are very alarming and potentially damaging. My fiancé can’t or won’t explain to me what these messages could be referring to so I really need to get to the bottom of it. If anyone can help with some suggestions on a way I may be able to get info on the previous number’s owner, or if anyone knows there’s literally no way I can do it I would really appreciate your help. Thanks.