What is the ICAO code for Dyersburg?

The ICAO code for Dyersburg is KDYR. The structure of ICAO codes consists of a four-letter format where the first letter typically designates the geographic region or country. In this case, "K" indicates that the airport is located in the United States. The subsequent letters "DYR" further specify Dyersburg Regional Airport.

This aligns with the naming conventions used by ICAO, ensuring that each airport has a unique code that reflects its location and identity within the air traffic management system. The other codes listed do not correspond to Dyersburg, thus affirming that KDYR is the correct identifier for this airport.