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: 1756
Hash: 30823ec40a3902d68d32dd0f6e042265962822e175f93dda181de8f16dcfe603
Previous block: 317908aebcfc28804862af742c304b4e4d748e3b5b554757edc57a466a91a55e
Next block: 3b3dd28ac66babd27d685d4684c41f7a4992246574f76cd9cd9afca4c9662a77
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159216
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: b6f5a45e10587b2b10c870b26178291f81df412af03339388ec98bca75b0a611
Median time: 1719159215
Difficulty: 4.656542373906925e-10
Confirmations: 488
Chainwork: 0000000000000000000000000000000000000000000000000000000000000dba
Bits: 207fffff