What network does Coinbase use for USDT?

Excuse me, could you please clarify which network Coinbase utilizes for transactions involving USDT? As a cryptocurrency enthusiast, I'm particularly interested in understanding the specifics of the platform's operations and the networks it integrates with for various digital assets. It would be insightful to know the underlying technology that facilitates the exchange and storage of USDT on Coinbase, given its widespread adoption and acceptance in the crypto sphere. Thank you for your time and expertise in addressing this query.