Caller-ID spoofing is the process of changing the name that comes up on another person's phone when you call them. Caller-ID spoofing software can change the Caller-ID that appears to anything the user wants. One good way to block such practices is to use a service that reveals the true number of the caller.
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Visit a website like Trapcall.com.
Click on "Try Trapcall Free."
Click on "Start free trial." Fill out your information in the boxes once the next page loads. Click "Create Account."
Deny a call that you get that may be caller-ID spoofed. Trapcall will then send you the true number of the caller.