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: 1730
Hash: 5b04f908a6d0304bcbfa57a4d8b2341c97b734fe91bd630e9e9f000172a430a1
Previous block: 4220894403508ac2fedb8376a4e1e804f0b977c1f32652d0eec95dd770071bfb
Next block: 34cd2b1e037f293823ac8b5b747d4b49d7d28927de92680c81c445c58bc06874
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159212
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: e76c6935fa6d71c758a52c29ac9fc246dc17954afad5accc7d2ca5711ee773de
Median time: 1719159211
Difficulty: 4.656542373906925e-10
Confirmations: 514
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d86
Bits: 207fffff