4 ms·

Automatic Number Identification (ANI) is not the same system as caller ID. ANI is used for billing purposes and is harder to spoof than CID. Caller ID uses in-b

by c22 9y ago

Automatic Number Identification (ANI) is not the same system as caller ID. ANI is used for billing purposes and is harder to spoof than CID. Caller ID uses in-band tones which is why it's so easily spoofed.