# Networks

- [Mainnet](https://docs.filecoin.io/networks/mainnet.md): Mainnet is the primary Filecoin network. Mainnet began on block 148,888. It supports 32 GiB and 64 GiB sectors.
- [Explorers](https://docs.filecoin.io/networks/mainnet/explorers.md): A block explorer is a tool that allows users to view and search the contents of blocks on a blockchain. This page covers available explorers for the Filecoin mainnet.
- [RPCs](https://docs.filecoin.io/networks/mainnet/rpcs.md): Public RPC endpoints are available for the Filecoin mainnet.
- [Network performance](https://docs.filecoin.io/networks/mainnet/network-performance.md): You can use these heuristics to understand general Filecoin network performance and how it fits your use case.
- [Calibration](https://docs.filecoin.io/networks/calibration.md): The calibration network is the most realistic testnet simulation of the Filecoin mainnet.
- [Explorers](https://docs.filecoin.io/networks/calibration/explorers.md): The following block explorers are available for the Calibration testnet, listed in alphabetical order.
- [RPCs](https://docs.filecoin.io/networks/calibration/rpcs.md): Public RPC endpoints are available for the Calibration testnet.
- [Local testnet](https://docs.filecoin.io/networks/local-testnet.md): Local networks are a useful way to get started with Filecoin development. This guide covers how to start a local network using Lotus as the Filecoin node implementation.
- [Get test tokens](https://docs.filecoin.io/networks/local-testnet/get-test-tokens.md): Test funds are available to developer so that they can test their smart contracts and applications within the confines of a test network. This page covers how to get test funds from a local testnet.
- [Deprecated networks](https://docs.filecoin.io/networks/deprecated-networks.md)


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