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: 1992
Hash: 4b1c1b8ab5be76bd813b06408924380ee2c61301bf8e64870cbc9f27f7559a88
Previous block: 0b13bd68af49ca0e4e3627f337ca3822c049ec0f46e3848970e6c9c55c8b7346
Next block: 2a6de308075dcfefb8145f281d3ffccb68062e6ea6f6676dd83e3bed5a000407
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159255
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 792ad940e3af8d15ea99430eed07e620a3f8d1e7be8813e067bb967b15cc7239
Median time: 1719159254
Difficulty: 4.656542373906925e-10
Confirmations: 252
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f92
Bits: 207fffff