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: 1789
Hash: 4f6319b310d6ba2bd8db975fdd5d9f95a1919e28d5e7b33879fc6628ab4dccc9
Previous block: 22b279cf0a4b71f3344306a35ca1ed61ac4b0df1daa44867c6b496c9a749bd6d
Next block: 2209c1be76679cb7a5f824d019804e82d0e4f8a97afbc6914dd984ac5f81ca4b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159221
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 00931beb21a07039eb16b642a6d0a0541536af422b21d34c7228013ab256cef0
Median time: 1719159221
Difficulty: 4.656542373906925e-10
Confirmations: 455
Chainwork: 0000000000000000000000000000000000000000000000000000000000000dfc
Bits: 207fffff