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: 1646
Hash: 2dba88935e6a57ae39fc69bce4fc8ac3c76b5c63ab5192c02001272ea5300da0
Previous block: 45c86f0bb6180abaf96e4db7d70bb97a0055e91273f467a72b202d2c46482d16
Next block: 65758adfdc5fccd6fe60e166c9672c64c6639fdc1c08604883b7d50654da4528
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159198
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: dd1454bb6f9c76cb03b9ab5184292be1c01d45901b8393d26cf735c177b2b442
Median time: 1719159197
Difficulty: 4.656542373906925e-10
Confirmations: 598
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cde
Bits: 207fffff