Threatening text from someone that knew personal information. People can purchase a number to send pranks. It is most likely someone you know doing this to you.
I have reveived a text from this number a couple months ago here is my situation:
"Back in october 2015 someone texted me from this number claiming to be "A" and asking for a Crystal shaped like a lotus thing did anyone get a text like that?"
(I copied and paste because I have posted a comment like this on another website)