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: 1600
Hash: 5deadc59c7ab950d55c69221f61f89babf63feef829d7c3a4e4eae28e4fb3341
Previous block: 5e71b6a59b2dc4438dcaec2886fc406aa6c2186496907af1bf4de8ac1949e74c
Next block: 3cf8f078cc1fe0c7154260fe891a966dee27857fb9966bf6870078387576c7b7
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697674
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 091dcd3854bad4f949fd130f4e9926c49c06b6691d46e8840a35143fdaa795b7
Median time: 1718697673
Difficulty: 4.656542373906925e-10
Confirmations: 644
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c82
Bits: 207fffff