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: 1257
Hash: 00f5883e0f664ab3918a8d7b6fa1c72d32cb5e544a698de8f141dc55cb569114
Previous block: 19e7b88bd9204de8de806e4cc73fbc47b251c515fcdad39c8cea6347f017a62f
Next block: 3172502a9f26a003a6451aa7500d064d1c941bff6c7950b8370c4b6766ff63ce
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697617
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 01edeb0bb03935e855a27862416ea3ff17b0fd5aab4b0238345d86648a4f4691
Median time: 1718697616
Difficulty: 4.656542373906925e-10
Confirmations: 987
Chainwork: 00000000000000000000000000000000000000000000000000000000000009d4
Bits: 207fffff