When it comes to cryptocurrency addresses, there is a lot of confusion surrounding the topic. One of the most common questions is whether Ethereum addresses start with a zero or an O. The answer to this question is actually quite simple. Ethereum addresses always start with a zero.
However, there are some exceptions to this rule. For instance, if you are using an ERC20 token, then the address will start with an O. Other than that, all Ethereum addresses will start with a zero.