Correct, addresses are not supported because the blockchain, in actuality, isn't aware of their existence. This explorer is meant to be run on top of a full node, full nodes don't keep an index for all addresses that exist, only that which has been indexed for the wallet.

That said, it's probably a good idea to have some kind of feedback for BASE58CHECK input, and show some heuristics. Thanks.

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The basic idea and design goal of this explorer is to display simply, yet deeply, what the contents of the blockchain are, what they are made of, what they look like and what they mean.

Addresses are 'just' an application on top of the blockchain which allows us to easily assign ownership, but at its core they are not directly related.

Thanks.