Special Privacy Provisions for End Users Who Block Their Originating Telephone Number

PURPOSE: This rule ensures end user privacy of blocked numbers, and to ensure that blocked numbers are available to terminating carriers for record creation purposes, without disclosure to the called party. (1) All originating carriers shall permit per-call blocking only in instances when the calling end user dials star 67 (*67, or 1167 from a rotary dial telephone), prior to dialing the telephone number. (2) All originating carriers shall permit per-line blocking only for authorized federal, state, and local law enforcement agencies and private, nonprofit, tax-exempt domestic violence intervention agencies, and the employees of each who have a need for such blocking. When receiving a request for per-line blocking, each telecommunications company shall determine whether the request has been made by an authorized law enforcement or domestic violence intervention agency. Only after verification that a per-line blocking request satisfies this rule requirement may a telecommunications company enable per-line blocking. (3) In all instances of per-call and per-line caller ID blocking, all originating carriers, transiting carriers, and traffic aggregators shall transmit the caller ID to the terminating carrier by the use of facilities designed to ensure that caller ID is not disclosed to the called party. (4) In all instances of per-call and per-line blocking, terminating carriers shall neither deliver nor disclose the calling party’s caller ID to the called party, but shall use such information solely for determining the jurisdictional and billing nature of the traffic. AUTHORITY: sections 386.040 and 386.250, RSMo 2000.* This rule originally filed as 4 CSR 240-29.060. Original rule filed Nov. 30, 2004, effective July 30, 2005. Moved to 20 CSR 4240-29.060, effective Aug. 28, 2019. *Original authority: 386.040, RSMo 1939 and 386.250, RSMo 1939, amended 1963, 1967, 1977, 1980, 1987, 1988, 1991, 1993, 1995, 1996.