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reply to bobby
Re: [Scam] Card Services relentless phone calls revisited
said by bobby :As posted by others, *67 does not work with Toll Free calls like 1-800, 1-888, 1-877, 1-866, or 1-855. They have ANI. There is no star-code (*-code) to block ANI.
I will now call the 1-800-218-8787 number 10 times a day, which will coast me nothing, but will cost them $. Be sure to place *67 in front of their nomber, *6718002188787 to block your number from being displayed.
Automatic number identification
Automatic number identification (ANI) is a feature of telephony intelligent network services that permits subscribers to display or capture the billing telephone number of a calling party. In the United States it is part of Inward Wide Area Telephone Service (WATS). ANI service was created by AT&T for internal long distance billing purposes, and is not related to newer caller ID services. Inward WATS is purchased by customers so that other telephone users (for example, prospective customers) can call the number toll free. The customer is issued a distinctive toll-free telephone number beginning with a special area code such as 800, or more recently, 888, 877, 866, or 855. Subscribers to these numbers are typically called Inward WATS subscribers.
ANI has two components, information digits, which identify the class of service, and the calling party billing telephone number.
ANI is also used to describe the functions of two-way radio selective calling that identify the transmitting user.
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It's a common misconception that only/just because it's an 800 number that they can get your number from blocked caller id.
Actually, it's really any company that answers and processes calls digitally - it doesn't matter if the number is toll free, or regular toll. As long as they're using a computer system to receive calls, they get the CPN data directly. Since calls are not terminating on analog caller id displays at a landline provider, they're not obligated to honor the privacy bit.
Some people will think of magical things with ani/CPN/BTN etc. but the fact of the matter is the vast majority of these phone numbers are simply ignoring the privacy bit. All the CPN is just a call-back or "directory" number that is used to populate the caller id display of the callee's Pots or Pots-like replacement service. Once you call into a computer system, then your number is fair game. There is no obligation to honor the privacy bit at that point.
What we're probably referring to for toll free numbers is the BTN or billing number. I guess that's the ANI as some might call it. Still, that information is not passed to the callee on the fly. It's only used for billing purposes witin the PSTN, so it's really not an "unblockable caller id". However, they'll be able to view the billing number on their bills once the call is billed.