Can Caller ID spoofing be used to call 911?
911 can only be spoofed to directly when using a PRI line from the telephone company. Commercial Caller ID spoofing providers, in our experiences, do not ever allow users to dial 911 from their system. This is typically due to the fact that they require numbers to be 10 or 11 digits long. A caller really has to go our of their way to spoof Caller ID to 911. Most people do not know that 911 numbers are also “secretly” available as direct 10 digit numbers. It may be possible for a caller to find this “backdoor” 911 number and call that number directly, as they would any other 10 digit telephone number. However, 911 does not solely rely on Caller ID spoofing or CPN (Calling Party Number) for identifying the originating phone. 911 can also receive BTN (Billing Telephone Number) or ANI which is much harder to falsify.
