Ethereum mainnet is the original public Ethereum blockchain that has real-world transactions and runs decentralized applications. Thousands of validators secure it and form the basis of the entire Ethereum network.
What is Ethereum Mainnet?
10 Jun, 2025
3 minutes
Ethereum is now among the most important and popular blockchain platforms following its first release in 2015. The decentralized finance (DeFi) protocol calls it home as well as holding thousands of decentralized applications (dApps), smart contracts, and token standards such as ERC-20 and ERC-721. However, before one can deploy the smart contracts or even utilize the dApps, there needs to be an awareness of where it takes place - the Ethereum Mainnet.
When they use the term "Ethereum" without specification, they typically mean Ethereum Mainnet rpc - the primary, live blockchain that involves actual transactions with actual ETH and assets. Being aware of what Ethereum Mainnet is and how it is different from testnets or other types of blockchain configurations is something that cryptocurrency users, investors, and devs should know.
The Ethereum Mainnet is the live running Ethereum blockchain. It's the live network where real transactions are happening, assets are being transferred, and smart contracts are being applied with real economic effects.
Main features of the Ethereum Mainnet:
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Real Assets: Transactions are actually being made using real BTC to ETH, ERC-20 tokens, NFTs, etc.
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Immutability: Once it is authenticated on Mainnet, a transaction is stamped in the history of Ethereum forever.
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Security: Thousands of nodes and validators are distributed around the world guarding it.
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Smart Contracts: Here, the production-quality smart contracts are deployed by the developers where users of dApps can interact to lend, stake, trade, and game.
Ethereum Mainnet is the foundation upon which most of the biggest decentralized crypto ecosystems are built. Uniswap to Aave, OpenSea to ENS domains - they're all built atop this layer.
Ethereum Mainnet vs Testnets
In order to understand an appreciation of the intent and purpose of the Mainnet, it is enlightening to compare Ethereum testnets. These are test networks which are designed to replicate the Mainnet but without the costs or risk of real transactions.
Key Differences:
Purpose | Live production network | Development and testing |
---|---|---|
Currency | Real ETH | Test ETH (no real value) |
Cost | Transaction fees in ETH | Free or faucet-based ETH |
Risk | High (real money involved) | None or very low |
Use Cases | Actual trading, staking, contract deployment | Experimenting, debugging, education |
Before they deploy a smart contract in the outdoors or a dApp to the Mainnet, programmers will test the code on testnets so that it will function as expected. Mistakes on the network have a cost - an incorrect smart contract can become bogged down or lose hundreds of millions of dollars in Ether. Testnets like Goerli or Sepolia allow testing safely.
How Ethereum Mainnet Works
Ethereum mainnet rpc is built on a decentralized network, which is secured by a consensus algorithm. It operates on Proof of Stake post-Merge, using which validators are able to authenticate transactions and suggest new blocks based on the amount of staked ETH to USDT.
Every transaction on the Ethereum main chain has the following constituents:
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Node verification
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Smart contract execution (if necessary)
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Joining a new block
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Permanent blockchain storage
Gas fees in gwei need to be paid for any operation to be executed. The fee is aimed at rewarding validators for their efforts in securing and operating the network.
Benefits of Ethereum Mainnet
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Security: With thousands of validators and global decentralization, Ethereum's mainnet is very secure from attack and manipulation.
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Immutability: Transactions and data on the mainnet are transparent and immutable.
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Liquidity: It supports most DeFi projects, including high user and developer liquidity.
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Interoperability: All ERC-20, ERC-721, and ERC-1155 tokens are completely interoperable on the Ethereum mainnet network.
Real-World Use Cases on Ethereum Mainnet
The Ethereum Mainnet supports a staggering list of utilizations that have time and again whirled business in its head. Some of the most prominent ones are:
1. Decentralized Finance (DeFi)
Ethereum Mainnet is the backbone of DeFi. Protocols like Aave, Compound, and Uniswap allow users to lend, borrow, and exchange crypto assets peer-to-peer in middleman-free transactions. It's hundreds of billions of dollars of activity riding on Mainnet availability and security.
2. Non-Fungible Tokens (NFTs)
OpenSea, Foundation, and Zora, etc., rely on Ethereum Mainnet to mint, trade, and sell NFTs - special digital tokens that hold art, collectibles, etc. Since these tokens are likely to have real-world worth, the transaction needs to be secure and verifiable, and the Mainnet fulfills the same.
{"setIdentifier": "3. DAOs (Decentralized Autonomous Organizations)"}
Ethereum Mainnet network also supports governance platforms for proposal management by communities, voting, and treasuries. MakerDAO, for example, runs its governance platform and DAI stablecoin natively on Mainnet.
4. Stablecoins and Payments
ETH-issued USDT, USDC, and DAI are some of the most widely used stablecoins and ERC-20 tokens on Mainnet. They facilitate borderless, instant payments and ubiquitously are being used across exchanges and wallets.
5. Identity and Domains
Ethereum Name Service (ENS) like services offer human-readable wallet addresses (such as ETH: "alice.eth"), and hold their domains on Ethereum Mainnet in under smart contract verification, which offers decentralized substitutes for the classic DNS.
All such applications value trustworthiness - Ethereum's Mainnet affords open contribution without needing to trust a centralized authority. That is half of one huge reason that it is the world's most used smart contract platform.
What Is Ethereum Base Mainnet?
The "Ethereum Base Mainnet" terminology is confusing. Otherwise, it'd be the name for the first Ethereum Mainnet - the first public blockchain on which real economic activity is taking place. But with Base launching the Layer 2 network from Coinbase, the terminology has been unclear.
Ethereum Base Mainnet = the original, foundational Ethereum network (Layer 1), upon which USDT to ETH and Ethereum tokens are purchased and sold and settled by Ethereum validators.
Base = a Layer 2 chain constructed on Ethereum by Coinbase to enable cheaper, faster trades. It enjoys Ethereum Mainnet rpc security through rollups but is otherwise a standalone network.
So when someone refers to "Ethereum Base Mainnet," what they are usually describing is the initial Layer 1 chain - the live, canonical blockchain where ETH, ERC-20, and smart contracts live and get resolved. It's the final layer for state validity and finality.
Ethereum Mainnet Upgrades
The Ethereum Mainnet has received several upgrades aimed at improving its scalability, security, and sustainability. All these have boosted the value addition of the network ability, taking it closer to fulfilling its vision in the future.
1. The Merge (September 2022)
Ethereum's biggest upgrade to this point, The Merge transformed Ethereum from Proof of Work (PoW) to Proof of Stake (PoS). It reduced Ethereum's energy usage by over 99%, bringing it closer to more environmentally sustainable blockchain goals.
2. Shanghai/Capella (Shapella) Upgrade (April 2023)
The upgrade featured staking withdrawals allowing validators to finally un-stake their ETH, decentralizing and making the network more responsive.
3. On the horizon: Proto-Danksharding (EIP-4844)
Peeking into 2024-2025 is Proto-Danksharding, which brings blobs - a new data structure that improves rollups. A prelude to full-blown danksharding, Ethereum's ambitious vision to scale 100,000+ transactions per second with rollups.
Other Notable Upgrades
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London Hard Fork (EIP-1559): Also brought a new fee-burning mechanism, which burst the ETH inflation bubble.
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Beacon Chain and Launch: Also initialized Ethereum's PoS consensus algorithm prior to The Merge.
These compound upgrades put the Ethereum Mainnet as an constantly enhancing infrastructure, a trailblazer of the performance and environmental needs of a rapidly growing worldwide user base.
Why Ethereum Mainnet Remains at the Top of the Hierarchy
Ethereum Mainnet is the strongest and most utilized smart contract platform in the crypto world. Its multi-layer structure, highest-security capabilities, and ever-growing user and developer following make it the pumping heart of Web3. From multi-billions-of-dollars' worth of DeFi protocols to NFT cultural phenomena, Mainnet fuels innovations that are reshaping what we know as finance, ownership, and the internet.
With every new version, Ethereum is quicker, cheaper, and more effective. And while testnets and Layer 2 networks move development and utilization forward at a breakneck pace, Mainnet is where the rubber hits the road - where code meets capital. When Web3 goes boom, being an Ethereum Mainnet guru is no longer the coder and trader's secret sauce - it's important to anyone who's got skin in the decentralized game.
Frequently Asked Questions
ERC20 is the token standard of Ethereum but mainnet is the network where ERC20 tokens and other smart contracts reside and are available.
Base mainnet is the Layer 1 blockchain of Ethereum, which is used to distinguish from Layer 2 networks providing scaling solutions. All end-of-day settlements remain on the base mainnet.
You can access the Ethereum mainnet via a supported crypto wallet such as MetaMask or Trust Wallet. Make sure to use the proper RPC settings or default Ethereum Mainnet setup in your wallet.