Which exchange is OMNI available on?

I'm curious to know which cryptocurrency exchanges support the trading of OMNI tokens. Could you please provide me with a list of the exchanges where I can buy, sell, or trade OMNI? It would be great if you could also mention any specific requirements or limitations that might apply to trading OMNI on these platforms. Additionally, if there are any recommended exchanges for beginners or for those looking for specific features, I'd appreciate any insights you have on that as well.