{"id":18131,"date":"2026-03-10T02:41:48","date_gmt":"2026-03-10T02:41:48","guid":{"rendered":"https:\/\/cryptoted.net\/index.php\/2026\/03\/10\/london-mainnet-announcement-ethereum-foundation-blog\/"},"modified":"2026-03-10T02:41:48","modified_gmt":"2026-03-10T02:41:48","slug":"london-mainnet-announcement-ethereum-foundation-blog","status":"publish","type":"post","link":"https:\/\/cryptoted.net\/index.php\/2026\/03\/10\/london-mainnet-announcement-ethereum-foundation-blog\/","title":{"rendered":"London Mainnet Announcement | Ethereum Foundation Blog"},"content":{"rendered":"


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<\/g><\/svg><\/a>Important Update<\/h2>\n

On July 21, 2021, a consensus issue was identified on the Ropsten network, where the go-ethereum, Erigon and Nethermind implementations had different transaction validation logic than Besu and OpenEthereum. New versions of the affected clients have been released and are linked in the “Client Versions” table below. The block number for London is unchanged, and still is 12 965 000. Node operators using an affected client MUST upgrade to the latest version.<\/strong><\/p>\n

An overview of the issue is provided in the “Ropsten Consensus Issue” section.<\/p>\n

<\/g><\/svg><\/a>London<\/h2>\n

After a successful testnet deployement<\/a>, the London upgrade is now ready to be activated on the Ethereum mainnet. It will go live on block 12 965 000<\/strong>, which is expected between August 3-5, 2021.<\/p>\n

<\/g><\/svg><\/a>Client Versions<\/h2>\n

In order to be compatible with the London upgrade, node operators will need to update the client version that they run. The versions, listed below for each client, support London on the Ethereum mainnet. These releases are different from the previously announced releases that supported London on testnets. Previous versions do not support London on mainnet.<\/strong><\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Client<\/th>\nVersion Number<\/th>\nDownload Link<\/th>\n<\/tr>\n<\/thead>\n
go-ethereum (geth)<\/td>\n1.10.5<\/del> 1.10.6<\/td>\nDownload<\/a><\/td>\n<\/tr>\n
Nethermind<\/td>\n1.10.77<\/del> 1.10.79<\/td>\nDownload<\/a><\/td>\n<\/tr>\n
Erigon (f.k.a. TurboGeth)<\/td>\n2021.07.03-alpha<\/del> 2021.07.04-alpha<\/td>\nDownload<\/a><\/td>\n<\/tr>\n
Besu<\/td>\n21.7.1<\/del> 21.7.2<\/td>\nDownload<\/a><\/td>\n<\/tr>\n
OpenEthereum (f.k.a. Parity)<\/td>\nv3.3.0-rc.4<\/td>\nDownload<\/a><\/td>\n<\/tr>\n
EthereumJS VM<\/td>\nv5.5.0<\/td>\nDownload<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/g><\/svg><\/a>Notes:<\/h3>\n