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: 1709
Hash: 5cc7c1988580b0a5572dc736e799d802b7539093aa41ba56a9d7f761fc4fe4da
Previous block: 1b69a1441f867319b3382c50b8020811628e9008066be0fec0b7e7b9631655c0
Next block: 4f225f0008f30575f5386c686b79c8c4c967d8eba5ab73e2f2a70de9d8a67edc
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159208
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 6919a68f8eaff11afe92bbbb6091fb1af0c57a5ed9b91dad957d0001e588b5dc
Median time: 1719159207
Difficulty: 4.656542373906925e-10
Confirmations: 535
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d5c
Bits: 207fffff