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: 149
Hash: 73fa82885a7c1f87f42912bc38f3b0b3ae09c650987bdd430be9e6a1a6191bf0
Previous block: 1badc69a68fc2ec50d09b12d688fa0402bddab1ac3b6c5900844c70b3a8cd42b
Next block: 46c278829fe6996283f4b008f1015b19322f467f6f0a5509b43901234b6016e5
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074758
Stripped size: 228
Size: 228
Nonce: 1
Merkle root: 500af7cc23ea9117b27ad0f5fc1685ee531393b278476489e5db6dccd7490770
Median time: 1544074757
Difficulty: 4.656542373906925e-10
Confirmations: 53
Chainwork: 000000000000000000000000000000000000000000000000000000000000012c
Bits: 207fffff