The Arbitrum token ARB will open for airdrop claims in 2 minutes

ChainCatcher message, the Arbitrum token ARB will be available for airdrop claims in 2 minutes. According to Arbitrum documentation, the ARB token will open for airdrop claims at Ethereum mainnet block height 16890400 (expected to be on March 23, 21:00 Beijing time), and claims will end at Ethereum mainnet block height 18208000 (expected to be on September 23).

It is reported that ARB cannot be minted or claimed on the Ethereum mainnet, only on Arbitrum One. (source link)