NAB recently updated its list of Transmitter ID (TxID) codes for television stations.
NAB maintains a list of assigned TxID codes for all television stations at TxID.nabpilot.org. For a memory jog on what a TxID is, the ATSC 3.0 standard defines a way to assign an optional regionally unique number called a Transmitter Identification code (or TxID) to an ATSC 3.0 transmitter, a very useful way to keep track of individual transmitters in a Single Frequency Network, for instance. Since all TV stations are potential ATSC 3.0 transmitters, codes are assigned to all full and low power stations, as well as translators and Canadian and Mexican stations near the U.S. border. Whether a station is actually transmitting an ATSC 3.0 signal doesn’t matter in terms of assigning a range of TxID codes for that station—it’s based on the station’s RF channel, not the content or transmission protocol currently being used on the channel. For more information, here’s the link to the blog we issued describing the details about the TxID assignment table when it was launched in April 2022.
NAB recently updated the TxID database, since changes in stations happen periodically. In the updated database, 20 full power stations needed new TxID assignments, and several hundred changes were made in the low power categories, which can be found in the TxID Change History link on the website. We’ll continue to update the database on a regular basis.