What is a blockchain mainnet?
Published 2026-09-14Updated 2026-09-14Last verified 2026-09-14
Short answer
A blockchain mainnet is the live, production network of a blockchain where real transactions are processed, validated and permanently recorded. Unlike a testnet, mainnet assets have real economic value. Launching a mainnet requires its own consensus mechanism, validator or node infrastructure, native token economics and network rules.
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Detailed answer
Mainnet is the final stage of a blockchain release cycle: devnet, testnet, then mainnet. Once live, protocol changes require coordinated upgrades across node operators. Independent mainnets such as Ethereum run their own validator sets, while application chains and Layer 2 networks may inherit security from a base mainnet.
Related entities
Sources
- officialEthereum networks — ethereum.org · accessed 2026-09-14