Blockchain Explorer
Tool for searching blockchain — transactions, addresses, tokens, smart contracts.
A blockchain explorer is a web application allowing anyone to search and verify transactions, addresses, blocks and smart contracts on a public blockchain.
Most popular explorers:
•Etherscan.io — Ethereum mainnet + testnets
•BscScan.com — BNB Chain
•Solscan.io / Explorer.solana.com — Solana
•Blockchain.com/explorer — Bitcoin
•Polygonscan.com — Polygon
•Arbiscan.io — Arbitrum
What you can do:
•Verify a transaction — did it arrive and when
•View address balance — how many tokens it holds
•Track whale activity — monitor large addresses
•Check token contract — audit, minting address, transfers
•See token burn history
•Check smart contract source code (verified contracts)
Practice:
•Always verify incoming transaction on Etherscan before sending
•Webhook for address monitoring: Etherscan API or Tenderly
•"Contract verification" — check that code is open and audited
On-chain intelligence: Glassdoor, Arkham, Nansen — advanced tools mapping identities behind addresses.