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.

home    blocks

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

Height: 1947
Hash: 7d62c51021165e42b5319137025136f893204aefca25415887af141c7f6cfac2
Previous block: 3186c6c5494ff9d10f5e70128102c4188fb95024acc590f00553ba4d9db1c133
Next block: 2ae6900b00554326d7d16a8769c7c4d0ffc800aaf23d67d244dc10d34bfad7c6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159248
Stripped size: 218
Size: 254
Nonce: 6
Merkle root: ab2b90527fba13156d1855fa3b605bacb0fe17e3b0074b7014d0b0be522e522b
Median time: 1719159247
Difficulty: 4.656542373906925e-10
Confirmations: 297
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f38
Bits: 207fffff