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: 1800
Hash: 5de15ef3facb3244d87191db06b905554b83a0074d7a6aa1f88595e603a1f463
Previous block: 205673bafcc0f952c028d4dc13aeeceb762f9408a2cdc7bd89f9607cab947b1c
Next block: 1c570812f5fd63017d39c48e21d579cb21e0ed86a960d5f20e3ecd8f3b0bf8ef
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159223
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 82053bc98236315193be57074c34fd4278c1dfc6daac560587c93343b2f71f5c
Median time: 1719159222
Difficulty: 4.656542373906925e-10
Confirmations: 444
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e12
Bits: 207fffff