---
eip: 608
title: "Hardfork Meta: Tangerine Whistle"
author: Alex Beregszaszi
type: Meta
status: Final
created: 2017-04-23
requires: 150
---

## Abstract

This specifies the changes included in the hard fork named Tangerine Whistle (EIP 150).

## Specification

- Codename: Tangerine Whistle
- Aliases: EIP 150, Anti-DoS
- Activation:
  - Block >= 2,463,000 on Mainnet
- Included EIPs:
  - [EIP 150](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-150.md) (Gas cost changes for IO-heavy operations)

## References

1. https://blog.ethereum.org/2016/10/13/announcement-imminent-hard-fork-eip150-gas-cost-changes/
2. https://blog.ethereum.org/2016/10/18/faq-upcoming-ethereum-hard-fork/

## Copyright

Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).