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: 2458
Hash: 4b55c228679997728b54b0a0e90f1a38d588586af81a8e4476850b615381de28
Previous block: 46e9270fda93beeb086ab93df3ca159caae9e63f659ed41478a219b396b08221
Next block: 43054e83c09782f2b0f6a55ca17c42fe5edb6482ccdb4b962805c83e570f96ac
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847296
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 639d6d21a9be11854a0facf718cc1aacd30d164e47ce0b0acb2851b5e2bb98ef
Median time: 1743847295
Difficulty: 4.656542373906925e-10
Confirmations: 185
Chainwork: 0000000000000000000000000000000000000000000000000000000000001336
Bits: 207fffff