You can't be serious? After several people wrote that its an alarm company, and legit. Here's a thought.. Answer the phone(or call them back). That # was probably someone else's, and the alarm company thinks they're calling that person. So tell them that you are not who they think they are calling, and the calls will stop. Or, someone put on a caller list.. Best way to find out....answer the phone or call them back. It's that simple.
It's a security monitoring switchboard. We have Life Alert and used it for my wife's fall, they called back using this number to see if everything was alright. They didn't leave a message and my call had to be forwarded to an operator.