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.