STBU token evolves, and as a part of this process, it is moving to the new, more compliant protocol, STV3. It is also called Stobox Token V3.
The STBU tokens of the previous protocol, STV2, Stobox Token V2, have the following contract addresses.
The STBU tokens of the new protocol STV3 are currently issued on one network. Six more to come.
How to see the token's contract address
In MetaMask, click the token and see its contract address. You may need to scroll down a bit.
See how to exchange your STBU V2 for STBU V3 in this post.