TerraNullius: The Ethereum Message Board from Block 49,880 (August 7, 2015) — Still Getting Claims in 2026

Two weeks after Ethereum's genesis block, a Reddit user named "Semiel" deployed one of the earliest smart contracts on the network: TerraNullius.

What it does: Anyone can "claim" a hex coordinate and attach a message to it — a permanent, uncensorable message board on the blockchain. No tokens, no governance, no economic incentive. Just messages, forever.

The numbers: - Deployed at block 49,880 (August 7, 2015) - Compiled with Solidity v0.1.1 - 25 claims in 2015, then it sat mostly dormant - 687 claims during the 2021 NFT boom (people realized these were basically proto-NFTs) - 805 total transactions and counting — still active in 2026

It was referenced by the Guinness World Records and is one of the earliest surviving interactive contracts on Ethereum.

The original announcement was a Reddit post right here on r/ethereum, with Semiel sharing a Pastebin script so people could interact with it.

What's fascinating is how it predates every pattern we now take for granted — ERC-20, ERC-721, ENS, DAOs. This was someone experimenting with permanence on a chain that was two weeks old.

Contract: 0x6e38A457C722C6011B2dfa06d49240e797844d66

Full writeup with sources and verification: EthereumHistory.com

If anyone has stories about early Ethereum experiments like this, I'd love to hear them. We're trying to document the pre-2017 era before the context is lost entirely.