IEC-62106-9, RBDS – RDS variant used in North America

In May, 2021, the NRSC-4 Standard was incorporated into the European version of the Radio Data System (RDS) as IEC-62106-9, RBDS – RDS variant used in North America.
This document may be obtained from the IEC here:

• IEC 62106-9:2021: Radio Data System (RDS) - VHF/FM sound broadcasting in the frequency range from 64,0 MHz to 108,0 MHz - Part 9: RBDS - RDS variant used in North America

The version of NRSC-4 which was retired as a result, NRSC-4-B, United States RBDS Standard, Specification of the radio broadcast data system (RBDS), April, 2011, is archived on the NRSC web page here:

• NRSC-4-B: United States RBDS Standard (April 2011)