ATIS Standard on Toll-Free Numbers in the SHAKEN Framework (ATIS-1000093)

This document is intended to cover calls using Toll-Free Numbers (TFNs) within the SHAKEN
Framework. This addresses calls where the calling party number displayed in the Caller ID is a TFN. This
document considers scenarios involving the calling party’s use of the TFN in order to enable them to
attain full attestation for the TFN.