See who's calling

This number called me. I answered with my first name, but I only heard back a short sound (maybe like someone was starting to talk but was immediately cut off) and then silence. I left the call open but muted myself just to listen if I would hear anything from there but nothing. I suspect some sort of scam, but could have just been a technical issue with the call. The call was open for about a minute until they hanged up.