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: 1553
Hash: 61847994cb8209716f0cd1fa5542880c06216a072dfe0a2caed07f15afb7c824
Previous block: 267bdf8ae9cbb34bb5e3710a55c464aa40a0793e57aa3c6381fb5d7d9a63a2b6
Next block: 743131ed509f3525ced5f0bb2030beb66fb7b0152f72846c8a40f1d86de48d97
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697666
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: bf95b561406e6e8091fb75a77dbdf67e02b65d8e8f0d7c87070b7d7f35988e82
Median time: 1718697665
Difficulty: 4.656542373906925e-10
Confirmations: 691
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c24
Bits: 207fffff