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: 167
Hash: 5a00b8a580203b4cec7ae5b57497b3890f82554f7587b5e74b32442b693e5c67
Previous block: 751b7631e06fbf5b2be298de502bbeafb53436a0a71c5751c1cb041b209355da
Next block: 723ad1bc2567a041bbc62a0b667bc1f23fbd8f005004093e78a87607cbec3e4b
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074761
Stripped size: 228
Size: 228
Nonce: 1
Merkle root: 15fe53b0c40c87a3f0888d4ec8411b12804f3e64e3d3b882d53a5700c004fe6b
Median time: 1544074760
Difficulty: 4.656542373906925e-10
Confirmations: 35
Chainwork: 0000000000000000000000000000000000000000000000000000000000000150
Bits: 207fffff