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. mxMfLjAez

Height: 2125
Hash: 7239dd8d614df1a77b0ee485d7ac0f6933fd32952d96e74a6d3cfe90270bc6f9
Previous block: 0e1fbcfef3174e2a90aba31cc38330ef2e04eea76aae4a5ce3ee967c0a7d9eb0
Next block: 651314b1d608733563546224e855abb9fb70c045a8243df733ff2980ba200e31
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964791
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 604712e58a94599f5dc7dca529c96318e4e077dfe3dbd72bc60ecf78b5b2c7e7
Median time: 1728964790
Difficulty: 4.656542373906925e-10
Confirmations: 119
Chainwork: 000000000000000000000000000000000000000000000000000000000000109c
Bits: 207fffff