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: 176
Hash: 205c40da644a8eb71235684bdf3e94af54e7431a5d6a711482d32686b2ec7cc0
Previous block: 610d2a93770c83fb627c50b63274e90d42f27eed2a53ac37e0d8c6da1adf21a0
Next block: 311cf811e6b1f9fdf2c790ff7ebd1239b266a988271681b98efff31850ebeb86
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074763
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 8a1030b9e6d31628adc778653970e6b1da970c97f1b68bc294409b51ca90b81f
Median time: 1544074762
Difficulty: 4.656542373906925e-10
Confirmations: 26
Chainwork: 0000000000000000000000000000000000000000000000000000000000000162
Bits: 207fffff