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: 1625
Hash: 00315c8c44fca08e20db8ab238f5cf8f0154d8c6b9c145e2b13ed454bd1f51ec
Previous block: 6845775421595692f11c2ce5ef206e1afa246cdaa20aefcf8ec280b9b0728ed1
Next block: 6b31cb41d6ad1b774582de56fbbb6836856b5af2b9a58dbcd95e86a8fc142906
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159194
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 84c1e2c4089355d8e1d2214e2ced927f75d6cda21ad978f9fd1774c85be2ac40
Median time: 1719159193
Difficulty: 4.656542373906925e-10
Confirmations: 619
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cb4
Bits: 207fffff