Which network is USDT using?

I'm sorry, I'm not quite sure which network USDT is currently using. As a professional practitioner in the field of cryptocurrency and finance, I am constantly learning and updating my knowledge, but sometimes information can change rapidly. To get the most accurate and up-to-date information, I suggest you refer to the official website or social media channels of USDT or contact their customer service directly. They will be able to provide you with the latest and most accurate information about the network USDT is currently using.