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: 1617
Hash: 1cd26580e04db413daaf0aca7ab17c068c886939f5514f45786f2f4c9f02b062
Previous block: 0e7dea4d122a1c50d7f26d189a77c049e8b8058383e495958da6808d0dfd5a9d
Next block: 5a438cd74f95235ee4cd5bd33c7f827312fec23475ebd82a6f947d929c53b2df
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159193
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 2ce82b811232d3040b441725a2d86e71c0016d4c7310a261ccce9163c63d5b8b
Median time: 1719159192
Difficulty: 4.656542373906925e-10
Confirmations: 627
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ca4
Bits: 207fffff