I got the same caller three times today~! I tried to call back, it rings twice, then disconnects with fast busy signal sound...
I am sure it is spam or VOIP (automatic call through internet)
Think I am right on my previous response as note the City below... found this on that number on web:(direct copy/paste)
OBVIOUS SPAM TO ME
Phone Number : 512-955-3164
Phone Type : Landline
Phone Company : Ionex Communications South,...
Country : USA - United State
City : Panama-City
County : Travis