Hi Can you tell from a wallet address what network it is on?
Is there a difference between the Ethereum Network and the BNB Network, if so how can you tell?
Based on the prefixes of address. I am familiar with L1 and if its looks like eth then its likely from group of L1 networks like avalanche, fantom, bsc, polygon, arbitrum, optimism, and many more that uses that kind of address. Of course if its a coin with own chain its quite different from normal L1 project. Cosmos on the other hand have unique per blockchain but usually tip with start of the name of the tokens, like celestia with ces*** like sei network with sei*** something like that.
I think he is not referring to the L1, L2, and so on network but I think the network he is up to are the ETH, BNB, and other cryptos, according on what we said on his posts. Now on your comment about prefixes, I too can differentiate something but not it's not if what L's network is it but it's about if the address is SegWit, or Legacy. Yes this was about Bitcoin I'm referring to. It's interesting that some crypto or network has their own unique prefixes or addresses.
@OP, what I usually do to know it, is I paste the address on different crypto block explorer websites. They do have a big search box there. If there are results shown, well congrats, you just find out that the address is also from that network/crypto.