EIPs/EIPS/eip-607.md

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---
eip: 607
title: "Hardfork Meta: Spurious Dragon"
author: Alex Beregszaszi
type: Meta
status: Final
created: 2017-04-23
requires: 155, 160, 161, 170
---
## Abstract
This specifies the changes included in the hard fork named Spurious Dragon.
## Specification
- Codename: Spurious Dragon
- Aliases: State-clearing
- Activation:
- Block >= 2,675,000 on Mainnet
- Block >= 1,885,000 on Morden
- Included EIPs:
- [EIP 155](eip-155.md) (Simple replay attack protection)
- [EIP 160](eip-160.md) (EXP cost increase)
- [EIP 161](eip-161.md) (State trie clearing)
- [EIP 170](eip-170.md) (Contract code size limit)
## References
1. https://blog.ethereum.org/2016/11/18/hard-fork-no-4-spurious-dragon/
## Copyright
Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).