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: 163
Hash: 0f69b25a1f00a35939424a15d9591016a6dd8fdd7f92de8aef7dbea8a188a9f1
Previous block: 331c88b5ce6ddab3c7dab0460bcdfe9bade2388a2a51fa045526277d72ec8ab7
Next block: 4e0e1955011c7009eae65c1796f66b86d5d1f9862815b777a08a2159e553d877
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074760
Stripped size: 228
Size: 228
Nonce: 12
Merkle root: 8958c76af4ea33d788649a6073219aa82fcc4edf6787aee4e43fb81447d17f2b
Median time: 1544074760
Difficulty: 4.656542373906925e-10
Confirmations: 39
Chainwork: 0000000000000000000000000000000000000000000000000000000000000148
Bits: 207fffff