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: 1673
Hash: 787dbc19fd998065a503160bef0ae9e9249e0c6b2624d318f3b61ee0598fb63a
Previous block: 15f1dd5b5317d091a03489f497f25b4f6306d7dc0966d9a5d06921ebfefe1b4a
Next block: 7176fcaf5f249bd656c87cc5d0bd078fb9b1f93fd90b41d7f1be8fbadf6f6df7
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159202
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: e6977ede0736fdee147c984c66d275745c0092629a7d81e8797c46b7c1d429e9
Median time: 1719159201
Difficulty: 4.656542373906925e-10
Confirmations: 571
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d14
Bits: 207fffff