More on toll-free numbers
In answer to questions. The reason why the calling number is virtually
always revealed to the called party for toll-free numbers like 800,
888, etc. is that as "charge to called party" numbers they pass the
calling party identification via ANI -- Automatic Number
Identification -- the original billing mechanism for self-dialed
long-distance calls -- not the newer CNID - Calling Number ID (Caller
ID). While you can block CNID, under normal circumstances you cannot
block ANI. And ANI is much more difficult to spoof than CNID.
- - -
--Lauren--
Lauren Weinstein
[email protected] (https://www.vortex.com/lauren)
Lauren's Blog: https://lauren.vortex.com
Mastodon: https://mastodon.laurenweinstein.org/@lauren
Signal: By request on need to know basis
Founder: Network Neutrality Squad: https://www.nnsquad.org
PRIVACY Forum: https://www.vortex.com/privacy-info
Co-Founder: People For Internet Responsibility
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