Gorgeous boy, we used to have one that looked so much like him.
He's a red and white bicolor tabby, domestic short hair. Not a breed. His coat coloring is widely found in domestic cats. Very common.
Most cats are domestic cats - only about 3-5% of cats worldwide are purebred cats. Not many are of mixed breed either. He doesn't look like he has any purebred in him. A very typical example of a lovely looking domestic!