au

KDDI Corporation au, operating under the brand name "au," is a major mobile network operator in Japan. Identified by its Mobile Country Code (MCC) of 440 and Mobile Network Code (MNC) of 53, au provides a comprehensive suite of telecommunications services to a large portion of the Japanese population. As one of the "big three" mobile carriers in Japan, alongside NTT Docomo and SoftBank, au competes fiercely in a market known for its technological innovation and high customer expectations. KDDI offers 4G LTE and has been actively deploying 5G services, striving to deliver ultra-fast connectivity and enhanced mobile experiences across the nation. Beyond mobile services, KDDI's "au" brand is heavily ingrained within the daily lives of locals, it is a national institution in Japan. It offers a range of integrated services, including fixed-line internet, cable television, and e-commerce platforms. KDDI is known for its innovative marketing campaigns and partnerships, often collaborating with popular anime and entertainment franchises. The company plays a crucial role in Japan's technology landscape, contributing significantly to the country's advancements in mobile communication and digital infrastructure within the broader Asia and Middle East region.