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: 2515
Hash: 313a7551cf7b9bfdffe3bf845aa4c2edbff95d1a76100d3f73e3a7b719551175
Previous block: 373e19adf371d7cb499bd18f3e1559d5f0bc8adc24455674907df8534f124d83
Next block: 38493812e342bbe011bf9ad9043cf9ccb72e14f0522a4a43a463633fe8270a11
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847306
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: e4d3283f25e1a5787edd39259852f27b3295c211e053d2c52629f2034a0f5999
Median time: 1743847305
Difficulty: 4.656542373906925e-10
Confirmations: 128
Chainwork: 00000000000000000000000000000000000000000000000000000000000013a8
Bits: 207fffff