So is it some type of debt collector or wat? It got me scared not knowing who was calling me

My mistake caller identify herself as DRS! So this is some type of debt collector???

Got a call fm this # 916-668-4431 and caller ask for me by my full name. It kinda creep me out because i never get calls from anywhere when people ask for my full name.  She identify herself saying DSL. Wtf is that,just curious to what i might have been. To be safe i told her she had the wrong #. Anyone got a call fm this # and kno wat its regarding???

I googled the company name before deciding whether or not to call them back.  Sure enough, there's nothing but negative reviews about the "company" being fraudulent.