bitcoinjs-lib/src/network.js

module.exports = {
  mainnet: {
    addressVersion: 0,
    p2shVersion: 5,
    hdVersions: {
      pub: 0x0488B21E,
      priv: 0x0488ADE4
    }
  },
  testnet: {
    addressVersion: 111,
    p2shVersion: 196,
    hdVersions: {
      pub: 0x043587CF,
      priv: 0x04358394
    }
  }
};