I received a text message instructing me to call;

Hi John! We'd like to speak with you about the position you applied for on our job board. Call 6502001093 Text STOP to cancel

I calledand was on hold for awhile. A man finally answered and he identified that he was with "career hound" and they wanted to certify information I had sent to the site and he would then complete my registration and ask some prescreening questions.  I said that to my knowledge I had never sent any info to his site.  I asked to be taken off their call list and he said he would but he hung up as I was pointing out that he needed my phone number.  Curious I called back, again I was on hold listening to the "all our people are busy" stuff then the same guy answered.  I hung up and called back several times and each time the same thing happened.  What are the odds of that?  I think this guy recorded someone else's hold message.  Also he sounds very strange on the phone as though you are talking to a computer instead of a human.  

While on hold they give you their office hours but in Central Time which is a red flag since they're in California.  This may be legit, some guy starting out but it also may be a scam.  I didn't tell him anything.