This is a service used to notify mass recipients of alerts, such as closings of business due to extreme weather, emergencies, disasters, etc. I work for a government agency and this is the system they use.
"Rapid alert" for public health automated message that will not stop calling my phone number. No option to speak to a person or to cancel the alerts. Former employee must have signed up for some kind of alert service, and the number will not stop calling me! No caller ID, no company info, so frustrating!