> Note that Caller ID blocking (an actual service) did not apply to 800 / toll-free numbers: Not quite. Caller ID blocking works on toll-free numbers. The issu

> Note that Caller ID blocking (an actual service) did not apply to 800 / toll-free numbers: Not quite. Caller ID blocking works on toll-free numbers. The issue is that toll-free numbers have access to another system, ANI, which provides the originating phone number. It's also possible to get ANI on non-toll-free lines if you're willing to pay. https://en.wikipedia.org/wiki/Automatic_number_identification https://en.wikipedia.org/wiki/Automatic_number_identificatio...