i will never know if it was a wrong number but
like 3 years ago someone (during a school field trip i think) texted me "can i have ur number" and I just ignored it because i thought it was stupid. Come 3 years later, I text them back, asking "Do you still want my number?" and they surprisingly answer back. The thing is though they were really sassy and doubted that someone ever texted that to me, despite me sending a screenshot of their text from 3 years ago. They even threatened to block my number, which I found pretty funny.
I haven't deleted the conversation yet but it's stored on my old phone :C