Sec. 42.6  Retention of telephone toll records.

    Each carrier that offers or bills toll telephone service shall 
retain for a period of 18 months such records as are

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necessary to provide the following billing information about telephone 
toll calls: the name, address, and telephone number of the caller, 
telephone number called, date, time and length of the call. Each carrier 
shall retain this information for toll calls that it bills whether it is 
billing its own toll service customers for toll calls or billing 
customers for another carrier.

[ 51 FR 39536 , Oct. 29, 1986]