CNAM can only be set up for US Plivo numbers. The CNAM database is currently available only in the United States.
CNAM registration works differently for long codes and toll-free numbers. While the CNAM can be registered for toll-free numbers, there is no guarantee that CNAM will work even after registration.
Long codes: each long code number has a tag (the Destination Point Code) that lets the receiving phone carrier knows which national CNAM database to pull the CNAM from.
Toll-Free: toll-free numbers do not have a tag (Destination Point Code). As a result, the receiving phone carrier can only pull a CNAM from its own internal database. Even if Plivo does register your CNAM, it will not work if the receiving phone carriers do not update their database. This is an industry-wide restriction.
After a CNAM is registered, the CNAM will be displayed on the destination handset if the end operator and the handset supports the CNAM feature.
To check if your Plivo number has a CNAM feature, please reach out to our Support Team.