The call block (per call) feature enables users to block (hide) their caller id details (name and number) from displaying to the the called party.
Call Block (per call)
Block your name and number from being presented to the call display of the person you are calling.
Your name will display as "hidden"or "Private" and your number will be displayed as a generic number (that can not receive a call back).
Block CallerID (per call)
Dial *67 + number (ie: *67+14165551212 )