The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 1636
Hash: 7b9d5c1482d7b5ad045893b9f9658941b721ad74d1b629a15a2e2d33dfee2c6b
Previous block: 70439d3c278cd73794f87a8ea2ca023e2d1239a832d8b22103df9ca7b731072c
Next block: 7f20be65e31b2aff40b29e220cab9472068f741bf4842fe0786d973c358045ce
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159196
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 95f1a7e2e9c6a3c368d24fb3957919a942565368ced825fc6b1a8db12883bb8c
Median time: 1719159195
Difficulty: 4.656542373906925e-10
Confirmations: 608
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cca
Bits: 207fffff