You might very well be using the software my company produced. I'm not sure how the database is constructed, but there is a query we make that returns the type

You might very well be using the software my company produced. I'm not sure how the database is constructed, but there is a query we make that returns the type of call, it's reputation (on a -4 to +4 scale---low score is bad), the category, the carrier network and line type, which we pass on to the phone. I suspect it might be partially created from complaints about calling numbers, or even carrier (one recent spammer call I received came from the "Onvoy" carrier, whoever they are).