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: 1781
Hash: 1447f8ab8b1ad5d66ef8e34c20825b0f428dff5865fe0bbcc0b6f3561817d72f
Previous block: 30c898c13dd7260a82b4e917281aa1552396bb3e1fa9b43a52787bc5c6c74f7b
Next block: 12b270da3770795fbb4b96a5a0ef0ee6bf7ec8fa809469fa10cb7527410e8ad6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159220
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: e6d13406e7fb22be1842ef84d52f8c174993d7869f914cb53fb415a5f1735a52
Median time: 1719159219
Difficulty: 4.656542373906925e-10
Confirmations: 463
Chainwork: 0000000000000000000000000000000000000000000000000000000000000dec
Bits: 207fffff