Welcome to your complete guide to using Etherscan, the most widely-used Ethereum blockchain explorer. This FAQ covers everything you need to know as a beginner, from looking up transactions to verifying smart contracts.

What is eth scan?

Etherscan (eth scan) is a free blockchain explorer designed specifically for the Ethereum network. It allows users to search, view, and verify transactions, wallet addresses, smart contracts, and other on-chain data without needing to run a full Ethereum node. Think of it as a search engine for the Ethereum blockchain that makes blockchain activity transparent and publicly accessible. Etherscan serves millions of users daily and is the go-to tool for anyone using Ethereum, from beginners sending their first transaction to developers auditing complex smart contracts.

How do I look up a transaction using eth scan?

To look up a transaction on Etherscan, simply enter the transaction hash (TXID) in the search bar at the top of the page and press Enter. A transaction hash is a unique string of letters and numbers that identifies every Ethereum transaction, and you can usually find it in your crypto wallet or exchange's transaction history. Once you search, you'll see the transaction details including the status (confirmed or pending), the amount of ETH transferred, gas fees paid, and the block number where it was included.

If you don't have a specific transaction hash, you can also search by wallet address to see all transactions associated with it.

Why is my transaction showing as pending on eth scan?

Your Ethereum transaction appears as pending on Etherscan when it has been submitted to the network but not yet included in a block. This usually happens because the gas price you included was too low compared to current network demand. During times of high traffic, validators prioritize transactions with higher gas fees, leaving lower-fee transactions waiting. You can speed up a pending transaction by using the "Speed Up" feature in your wallet if it supports nonce manipulation, or simply wait until network activity decreases.

Most pending transactions resolve within a few hours, though extremely low-fee transactions might remain pending for days or eventually be dropped.

Can I use eth scan to verify if an address is safe?

You can use Etherscan to investigate an address's history, but you cannot definitively prove an address is safe or legitimate. Etherscan shows you all transaction history, token holdings, and interactions for any Ethereum address, which helps you make informed decisions. If an address has been flagged for scams or malicious activity, you might see warnings from community-based label systems. However, Etherscan cannot prevent you from sending funds to a scam address, so always double-check addresses carefully and never share your private keys.

Always verify the full address character by character when sending funds, as scammers sometimes use similar-looking addresses to trick users.

How do I read a smart contract on eth scan?

To view a smart contract on Etherscan, search for the contract's address and navigate to the "Contract" tab. You'll find the contract's source code if it has been verified, along with the ABI (Application Binary Interface) and read/write functions. The "Read Contract" section lets you interact with the contract to query data without spending gas, while "Write Contract" allows you to submit transactions to the contract if you connect a Web3 wallet. Understanding smart contracts on Etherscan is essential for verifying that a project does what it claims and for safely interacting with decentralized applications.

If source code isn't available, you can still view the raw bytecode under the "Contract" tab, though this is much harder to interpret without programming knowledge.

Does eth scan show gas fees and how do they work?

Yes, Etherscan displays detailed gas fee information for every Ethereum transaction, including the gas limit, gas used, and gas price in both Gwei and USD. Gas on Ethereum is the computational effort required to execute operations, and users must pay for this in ETH. When you view a transaction on Etherscan, you'll see exactly how much ETH was spent on gas fees, which helps you understand the true cost of your transactions. Etherscan also provides gas tracker tools that show current average gas prices to help you estimate fees before sending transactions.

The total gas fee for a transaction is calculated as: Gas Used × Gas Price. Etherscan displays this calculation clearly for every transaction.

What's the difference between eth scan and other blockchain explorers?

Etherscan is specific to the Ethereum network, while other explorers like Blockscout or Ethplorer serve similar purposes but with different features and supported chains. Etherscan is the most established and feature-rich explorer for Ethereum mainnet and testnets, offering comprehensive tools including token trackers, analytics dashboards, and developer APIs. Other explorers like Blockscout are open-source alternatives that also support layer-2 networks and sidechains. Some wallets and exchanges also embed basic block exploration features, but dedicated explorers like Etherscan provide the most detailed and reliable data for Ethereum activities.

If you're using a different blockchain like Solana or Bitcoin, you'll need a chain-specific explorer such as Solscan or Blockchain.com instead.

Do I need an account to use eth scan?

You don't need an account to use most basic Etherscan features, as all core blockchain data is publicly viewable without registration. Basic tasks like searching transactions, checking wallet balances, viewing contract details, and exploring blocks all work without logging in. However, creating a free Etherscan account unlocks additional features like watching addresses for notifications, accessing the developer API with higher rate limits, and verifying smart contract source code. For most casual users, an account isn't necessary, but if you're actively managing portfolios or building on Ethereum, an account significantly improves the experience.

Accounts also allow you to personalize your dashboard and save commonly searched addresses for quick access.

Final Thoughts

Etherscan is an essential tool for anyone using Ethereum, serving as the primary window into the blockchain's activity. As a beginner, focusing on just a few core features—transaction lookup, address searching, and basic contract viewing—will give you most of the utility you need. The platform is free, secure, and designed to make blockchain data accessible to everyone, which aligns with Ethereum's core principle of transparency.

As you become more comfortable, you'll discover advanced features like token trackers, analytics tools, and developer APIs that can support more sophisticated activities. Remember that while Etherscan is reliable and widely trusted, always verify information across multiple sources for critical decisions. Bookmark Etherscan and make it part of your regular Ethereum toolkit as you continue your journey into blockchain technology.