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: 190
Hash: 32eb8a28c1a4cf1cd3c624485fd90cc7134825cafc7569cca030267ef5ef2955
Previous block: 25249fa9f1d59a4d92c355e0013d6792ba1bf4b1fa36bdb5ca40f5a81b3d4ef1
Next block: 7ab664df17e13564256bb4fc886207b806dc6a96e60a7ad708febb5c6ac05ac0
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074765
Stripped size: 228
Size: 228
Nonce: 5
Merkle root: 295150564ce242fe58fc4f84f6af570c5ddd801a373243fbd34acb39233efd89
Median time: 1544074764
Difficulty: 4.656542373906925e-10
Confirmations: 12
Chainwork: 000000000000000000000000000000000000000000000000000000000000017e
Bits: 207fffff