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: 1544
Hash: 7d1fe01641c4ef5b6e2cb8f61550167f787b930b81174e564663544b72571203
Previous block: 3e11371d0c3ba2e0b9103efdce241aaa679021c8992608c9460b87b76ffb3487
Next block: 033aae1c835a70cc8300546731d8e7397f60882d0b8745f19989a8298b45a24b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697665
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 03d876f019b937f1eedb8bb2c50b8b2e2da58a1efd63b1d07e4be1341224da63
Median time: 1718697664
Difficulty: 4.656542373906925e-10
Confirmations: 700
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c12
Bits: 207fffff