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: 1777
Hash: 4d0c8cb29c78f0a8814af3df5232099a68c0d1d97a726dd40897d9d5a7af99a8
Previous block: 056996f8e1bf9a374f4bd2e67385dc6bdd4797bf0cf04e71976dfee011ffac0e
Next block: 6143f7929ebd243743e4adce122734508379bff6351167e55e369a8a9f397b05
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159219
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 0a46480a1964f03e3dd460915100d2e35305cd686553eeb0c3e4e8925548dc04
Median time: 1719159219
Difficulty: 4.656542373906925e-10
Confirmations: 467
Chainwork: 0000000000000000000000000000000000000000000000000000000000000de4
Bits: 207fffff