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: 1256
Hash: 19e7b88bd9204de8de806e4cc73fbc47b251c515fcdad39c8cea6347f017a62f
Previous block: 5cbff367904675f64c13bbb29331c790b557a917982468ceb07ea87377ec0957
Next block: 00f5883e0f664ab3918a8d7b6fa1c72d32cb5e544a698de8f141dc55cb569114
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697617
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 9eddb22bee6ae0fae8b91c29c2b662b002a90f3c5438453b94ee928f4b0db797
Median time: 1718697616
Difficulty: 4.656542373906925e-10
Confirmations: 988
Chainwork: 00000000000000000000000000000000000000000000000000000000000009d2
Bits: 207fffff