How to Identify Caller ID Spoofing
Caller ID spoofing allows a person to dial any number using a fake number, different from their own, which will appear on your caller ID. Caller ID spoofing is easier than ever with the facilitation of websites that offer free spoofing service. Some services provide voice scramblers that distort the caller's voice, making gender unclear. The only sure way to know if you have been spoofed is to report the call to your phone company and have them look into it. However, there are steps to help you determine if your caller ID has been spoofed.
Ask who is calling. If the person provides information, take note of what they tell you, as it may be useful to your cell phone provider.
Use reverse phone look up. By entering the phone number, reverse lookup can return pivotal information, such as owner, carrier and other details. Many of these services offer free basic information, without providing the caller's identity.
Note any information the reverse look up provides, such as a person's name, company, home town and service provider. While this may not necessarily be the person who called you, if you have been spoofed, this information could help the phone company determine who called.
Report the call to your phone service carrier. Telephone companies have the technology to trace calls back to their origin, regardless of whether or not your caller ID has been spoofed. Make sure to tell your provider the number that dialed you, when they called, whether you answered and the ensuing conversation, and the information -- if any -- you gathered from reverse phone look up.
Use a service like Trapcall.com, which blocks spoof calls before they happen. Trapcall provides features allowing you to block calls with fake caller information, which will prevent spoof calls from coming through.