Verizon's network appears to be experiencing a major service outage centered around Florida. It seems the outage mostly affects calling, not necessarily data or texting. More as we receive it (update: Verizon statement below) - but Down Detector makes it clear something is up. It is not known if any other regions are affected by the outage at this time.
Update: Verizon issued us this brief statement, tl;dr, they know, obviously:
We are aware of the issue affecting some connections in Florida. Our network teams are working to resolve the issue.