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. mkrgsKuFE

Height: 196
Hash: 584925d01c9571be187c0fae5bf12b55bb0011aa01eaecddedc749600c46296c
Previous block: 023f24636488bb126523aa45a1a2ba24932d575404c4b3e90d00a013f99147e6
Next block: 3b7eff6da5c9ddd3782607eea3bdd1916459fc0908be7ee38df579b3d01b48f3
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074766
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: c565cc457f7f7066f3d79e2677fe484ab54a5540ab178e4ab14d7387fdbc200b
Median time: 1544074765
Difficulty: 4.656542373906925e-10
Confirmations: 6
Chainwork: 000000000000000000000000000000000000000000000000000000000000018a
Bits: 207fffff