The requirement was that we create a SaaS application that would allow a brand with multiple locations to set up phone routing based on a ZIP code. The caller would call a national number and hear a recording of telling them to enter their ZIP code, this would route the call to the nearest location to them.
Intercepting an inbound call and redirecting it to a different forwarding location based on a condition is not a easy thing to setup for a SaaS model business.
We used a variety of tools to accomplish this requirement when we built this solution. We also helped with the branding and design to create a user friendly experience.