holders.at: NFT holder snapshots tool

holders.at is a tool that takes token holder snapshots of NFT collections at a chosen block, then lets users copy or export the wallet list or share a snapshot link. The site says it supports ERC721 and ERC1155 collections on Ethereum, Polygon, BNB Smart Chain, Arbitrum, Optimism, Zora and Base. The stated uses include building lists for future airdrops and allow lists. An example snapshot link is given for the Based Ghouls collection on Ethereum at block 15400000.