Guide: How Enterprises can Block Spoofed Calls Before They Reach Customers
When a scammer spoofs your enterprise’s outbound numbers, your customers face fraud and your brand takes the blame. SENTRY® Call Blocking authenticates each outbound call in real time, so calls without a valid key are blocked before they reach consumers. It works across all major U.S. carriers and matters most for industries often targeted by impersonation fraud, including financial services, healthcare, and insurance.
In this guide, you’ll learn:
- How SENTRY authenticates calls. First Orion generates a time-limited key for each call and shares it with the carrier network. Calls with a valid key are delivered, and calls without one are blocked.
- What SENTRY protects. SENTRY helps prevent costly fraud incidents, protect your brand reputation, increase agent productivity, and keep customers safe from bad actors.
- The three steps to get started. Complete free Business Number Registration, have each number vetted to establish Right of Use, and choose an API or SIP integration.
- How long activation takes. Implementation takes about 4 to 6 weeks after successful integration with Call Authentication. Each carrier sets its own requirements, including monitoring periods of up to 21 days.
- What reporting shows. Track authentication requests, blocked calls, and blocked rate, then export the data to CSV or Excel and filter by business unit, program, or date range.


