user1142: The cardano testnet has a protocol/testnet magic value of 1097911063.
Where do I find this value for the preprod and preview test networks?

user1071: You can check the byron or shelley genesis files for protocolMagic or networkMagic respectively.
Genesis files for each network can be found here: https://book.world.dev.cardano.org/environments.html

1142: <p>The cardano testnet has a protocol/testnet magic value of <code>1097911063</code>.</p>
<p>Where do I find this value for the preprod and preview test networks?</p>
 1071: <p>You can check the byron or shelley genesis files for <code>protocolMagic</code> or <code>networkMagic</code> respectively.</p>
<p>Genesis files for each network can be found here: <a href="https://book.world.dev.cardano.org/environments.html" rel="nofollow noreferrer">https://book.world.dev.cardano.org/environments.html</a></p>
