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: 839
Hash: 7479b33dcd65477103ecfab3428549e655370766b8c053e88d9629b889bdcc11
Previous block: 684829a63f99d8f6aed464f8b96f05fe7ae1a81907bceebe9a41a637236bdb4d
Next block: 7b0113b0dbe849a7b413526bd2621a8a1c4fc941eb916776bc56ae19f7c182b2
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857808
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: e5e1e9fc36c1be4019b4753308e0cb99b24c5b91cae172132956139879dc503e
Median time: 1707857807
Difficulty: 4.656542373906925e-10
Confirmations: 1405
Chainwork: 0000000000000000000000000000000000000000000000000000000000000690
Bits: 207fffff