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: 1790
Hash: 2209c1be76679cb7a5f824d019804e82d0e4f8a97afbc6914dd984ac5f81ca4b
Previous block: 4f6319b310d6ba2bd8db975fdd5d9f95a1919e28d5e7b33879fc6628ab4dccc9
Next block: 60f5fe4f5b69b0d0a74c06b28e894b25d95af28b322c6fffc6bd2ea04aef8474
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159222
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 3441179a3796b710f5e0ea13393d53645101ebf10e6e40b12eabd8f24652a745
Median time: 1719159221
Difficulty: 4.656542373906925e-10
Confirmations: 454
Chainwork: 0000000000000000000000000000000000000000000000000000000000000dfe
Bits: 207fffff