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: 2499
Hash: 3bc42f05dd0188c50d315e3e68bdc0cff981bca2e689974c713f8680b9fa4c1f
Previous block: 0b195af33b2270926473fe4d92db6509c6f7adaa17b042a1ce8d6a0a8f0c66a3
Next block: 2d3fc9a1ad04f266e8d2b1ed54103369671cbdce277d001fd8817d4c24d79f0b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847303
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: bda5ff34996d342f9472e210c95c7dcf2f7229a35f1b2cfa8ba7602139e9c89b
Median time: 1743847302
Difficulty: 4.656542373906925e-10
Confirmations: 144
Chainwork: 0000000000000000000000000000000000000000000000000000000000001388
Bits: 207fffff