Topic
What is a blockchain network?
Last reviewed:
- Quick fact 1
A blockchain network is run by many computers (nodes) that share and check the same record.
- Quick fact 2
Ethereum has a main network and separate test networks; assets on one do not appear on another.
Source: ethereum.org: Networks
- Quick fact 3
Ethereum-style addresses look the same across many networks, so an address alone does not tell you the network.
Source: ethereum.org: Accounts
The short lesson
A blockchain is a record. A network is the group of computers, called nodes, that keep copies of that record, pass new transactions to each other and check the rules.
There are many separate networks: Bitcoin, Ethereum, and many others built for different jobs. Each one keeps its own record. A coin on one network does not show up on another by itself.
This is where beginners lose money. When you send crypto from an exchange, the send screen often asks you to pick a network. The same token can exist on several networks. If you pick a network the receiver does not support, the funds can arrive somewhere they cannot reach, and the send cannot be undone.
Safe habits:
- Ask the receiver which network to use, in writing if you can.
- Match the network on both sides, not just the coin name.
- Send a small test first.
Our Fee and network checker can flag a mismatch between an address and the network you picked.
Related terms
Go deeper in Lesson 4: The shared list everyone can check
Common questions
What is a mainnet?
The main, live network where real assets move. Testnets are practice networks with no real value.
What happens if I send on the wrong network?
The funds can become unreachable. Sometimes the receiver can recover them; often not. Always match networks first.
Is a network the same as a coin?
No. A coin or token lives on a network. Some tokens exist on several networks.
How do I know which network to use?
Ask the receiver. Their deposit screen usually names the network it accepts.