Block explorer

Block explorer: A block explorer is a website or app that lets you search a blockchain's public record. You can look up a transaction ID, a wallet address or a block and see amounts, fees, confirmations and timestamps. Etherscan for Ethereum and mempool.space for Bitcoin are common examples.

By Matt Willemsen, Director of Research, reviewed by Ben Simpson. Updated November 2026. General education only.

How a block explorer works

The explorer runs or connects to nodes on the network, reads every new block and indexes the data in a searchable database. Because public blockchains are transparent, anyone can view the same records without an account.

What you can check

  • Whether a transaction is pending or confirmed, and how many confirmations it has.
  • The fee paid and the addresses involved.
  • The balance and history of any public address.
  • Token contracts and holder lists on smart contract networks.

Frequently asked questions

Can a block explorer show who owns an address?

Not directly. Addresses are pseudonymous, although activity can sometimes be linked to people or exchanges.

Is it safe to paste my address into a block explorer?

Yes, your address is public. Never enter a private key or seed phrase.

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