How to use Etherscan

Etherscan is a powerful Ethereum blockchain explorer that enables users to verify transactions, track wallet balances, and analyze smart contracts in real time.

Jul 13, 2025 at 11:07 am

What Is Etherscan and Why Should You Use It?

Etherscan is a blockchain explorer specifically designed for the Ethereum network, allowing users to search, verify, and analyze transactions, smart contracts, and wallet addresses. Unlike traditional financial systems, where transaction details are hidden behind centralized institutions, blockchain transparency enables anyone to access this information freely through tools like Etherscan. Whether you're sending or receiving ETH, interacting with decentralized applications (dApps), or deploying smart contracts, Etherscan provides real-time insights into all Ethereum-based activities.

The platform supports not only native Ethereum transactions but also ERC-20 tokens, ERC-721 NFTs, and other token standards built on top of the Ethereum blockchain. This makes it an essential tool for developers, investors, traders, and everyday users who want to ensure their transactions are processed correctly and securely.

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How to Look Up a Transaction on Etherscan

To begin exploring Ethereum data, navigate to etherscan.io. In the search bar at the top, paste a transaction hash, wallet address, or contract address. Pressing Enter will take you directly to the relevant page.

If you're verifying a transaction, locate the transaction ID (hash) from your wallet or exchange interface after sending or receiving funds. Paste this hash into the search bar and hit Enter. The resulting page will show detailed information such as:

• From and To addresses
• Transaction value in ETH and USD equivalent
• Gas fees paid
• Block confirmation status

Each section is clearly labeled, and clicking on any linked address or block number will allow further exploration of related data.

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How to Check Your Ethereum Wallet Balance

Checking your wallet balance is one of the most common uses of Etherscan. Begin by entering your public Ethereum address into the search bar. Once on your wallet's overview page, you'll see:

• Total ETH balance
• Token balances (ERC-20, ERC-721, etc.)
• Number of outgoing and incoming transactions

Under the "Transactions" tab, you can view a full history of all activity associated with that wallet. Each entry includes timestamps, transaction hashes, and links to related blocks. For privacy reasons, never share your private key or seed phrase—only your public address should be used for lookups.

Additionally, under the "Internal Transactions" tab, you can explore interactions initiated by smart contracts on behalf of your wallet.

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How to Verify Smart Contract Code on Etherscan

Developers often deploy smart contracts to the Ethereum network. If you interact with a contract, it’s crucial to verify its source code to ensure it behaves as expected. Here's how:

• Navigate to the contract address via the search bar.
• Click on the "Contract" tab.
• If the contract has been verified, you’ll see a green checkmark next to the label "Contract source code verified."
• Clicking on "Read Contract" lets you view publicly accessible functions without executing them.
• Use the "Write Contract" feature to interact with the contract if connected via MetaMask or another Web3 wallet.

Verifying source code ensures transparency and reduces the risk of engaging with malicious contracts. Developers can submit their code for verification using the Etherscan verification tool, which requires providing compiler settings and source files.

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How to Track Gas Fees and Network Congestion

Etherscan offers real-time tracking of gas prices and network congestion. At the top of the homepage, click on the "Gas Tracker" link to open a dedicated page showing:

• Current average gas price in Gwei
• Fast, standard, and slow transaction speeds
• Estimated time for each speed option

You can also access this data through the "Tools" menu. By monitoring gas trends, users can optimize when to send transactions to avoid high fees during peak times. The Etherscan Gas Chart displays historical gas usage over 24 hours, 7 days, or 30 days, helping users make informed decisions about transaction timing.

For advanced users, Etherscan provides custom gas settings, allowing manual input of gas price and limit before broadcasting a transaction.

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Frequently Asked Questions (FAQ)

Q: Can I use Etherscan for other blockchains like Binance Smart Chain or Polygon?

A: Etherscan primarily supports the Ethereum blockchain. However, similar explorers exist for other chains—like BscScan for Binance Smart Chain and Polygonscan for Polygon.

Q: Does Etherscan store my private keys or personal data?

A: No, Etherscan does not store private keys or sensitive user data. It only indexes publicly available blockchain data. Always keep your private keys secure and offline.

Q: How do I know if a transaction is confirmed on Etherscan?

A: On the transaction page, look for the "Status" field. If it shows "Success," the transaction has been confirmed. If it shows "Pending," it's still being processed by the network.

Q: Can I cancel a transaction once it’s sent through Etherscan?

A: Once a transaction is broadcast to the Ethereum network, it cannot be canceled. However, if it's stuck as "Pending," you may attempt to speed it up or replace it using MetaMask or other wallets that support custom nonce management.