ethers.js/src.ts/providers/networks.json

{
    "unspecified": {
        "chainId": 0,
        "name": "unspecified"
    },

    "homestead": {
        "chainId": 1,
        "ensAddress": "0x314159265dd8dbb310642f98f50c066173c1259b",
        "name": "homestead"
    },
    "mainnet": {
        "chainId": 1,
        "ensAddress": "0x314159265dd8dbb310642f98f50c066173c1259b",
        "name": "homestead"
    },

    "morden": {
        "chainId": 2,
        "name": "morden"
    },

    "ropsten": {
        "chainId": 3,
        "ensAddress": "0x112234455c3a32fd11230c42e7bccd4a84e02010",
        "name": "ropsten"
    },
    "testnet": {
        "chainId": 3,
        "ensAddress": "0x112234455c3a32fd11230c42e7bccd4a84e02010",
        "name": "ropsten"
    },

    "rinkeby": {
        "chainId": 4,
        "name": "rinkeby"
    },

    "kovan": {
        "chainId": 42,
        "name": "kovan"
    },

    "classic": {
        "chainId": 61,
        "name": "classic"
    }
}