How to read a block explorer
- Author
- CRYPTO PORT Editorial
- Published
- Updated
- Reading time
- 6 min
In short
A block explorer is a public viewer for everything recorded on a blockchain. It lets you check why a transfer has not arrived, investigate what a token actually is, and see what fees really cost. Learning to use one means you can establish the facts yourself before asking an exchange or a support desk.
Key points
- Search by transaction hash, address or block number
- Status — success, failed, pending — and confirmation count are your first facts in any delivery problem
- Each chain has its own explorer; looking on the wrong one returns nothing
- Address history is public to everyone, so do not assume anonymity
Definition
A web service that indexes a blockchain's blocks, transactions and addresses and presents them in human-readable form. Each chain has its own.
Start with the fact that each chain has its own explorer. An Ethereum transaction appears only on an Ethereum explorer, a Solana transaction only on a Solana one. When a search turns up nothing, a mismatch between the chain you sent on and the explorer you are searching is a frequent cause. Exchange withdrawal histories usually link straight to the right explorer.
There are three ways in: a transaction hash (TxID) for a single transaction, an address for its history and balance, or a block number for the transactions in that block. For chasing a transfer it is almost always the hash — copy it from your exchange history and paste it into the search box.
On a transaction page, look at the status first. Success means it is complete as far as the chain is concerned, so a missing delivery is either the recipient's own crediting process or a wrong destination address. Failed means it did not execute, though gas was typically still consumed. Pending means it has not been included in a block yet, often because of congestion.
Next come sender, recipient, amount, fee and confirmations. The confirmation count is how many blocks have been stacked on top of the one containing your transaction, and exchanges normally require a minimum before crediting a deposit. 'The explorer says success but the exchange shows nothing' is usually this wait; the required number is stated on the exchange's deposit screen.
Explorers are also how you investigate tokens. Search a token's contract address and you see holder counts, transaction counts and supply. Since anyone can mint a token with any name and symbol, identity has to be judged by contract address rather than by name. 'How to verify a token contract' goes into this properly.
Watch out for
- · An explorer is a viewer, not an endorsement. Token names and labels shown there can be self-declared and prove nothing about legitimacy
- · You do not need to connect a wallet to browse one. A site demanding a connection just to look things up may well be a fake
- · Giving someone your address lets them see your balance and entire history. Think twice before posting it publicly
Frequently asked questions
Where do I find the transaction hash?
In the withdrawal or transfer history of an exchange, or the transaction detail view of a wallet. Services label it variously as TxID, transaction ID or hash, and usually link straight to an explorer.
My transaction is stuck pending. Can I cancel it?
If the exchange sent it, you cannot cancel it. If you sent it from your own wallet, some chains and wallets let you replace it with a higher fee — but anything already confirmed cannot be undone.