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: 2554
Hash: 734016b97504a58dc4890cb2e47dfaaca30f794c03092bfda83230024fe54696
Previous block: 25abfea7f609e620d511e631bb26f618660f9a23e1723eb8f9167419683eca11
Next block: 3678f0527b35ae4c55a7159240734f4aa8d26c9fba0a9504e7f2f6dcdc335bf8
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847312
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 9fa0bdedb6059731bbab9b6bd0bd0f2e435a85c6a98f50553a7c1781989bae1d
Median time: 1743847311
Difficulty: 4.656542373906925e-10
Confirmations: 89
Chainwork: 00000000000000000000000000000000000000000000000000000000000013f6
Bits: 207fffff