The only foreign operator was the Royal Hungarian Air Force, which acquired four Do 23s starting in 1940, likely as surplus from German stocks amid Hungary's efforts to modernize its inventory through Axis alignment. These aircraft served in training and secondary bombing roles until withdrawal around 1944, supplementing Hungary's limited heavy bomber fleet during early World War II commitments. No specific Hungarian squadrons are documented for exclusive Do 23 operations, indicating ad hoc integration into general air force assets.
