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: 1689
Hash: 0ead3d89590de22b8e8419da735cc52cdf62fe934837b09e92d2e33bbf49ab32
Previous block: 3dd26f26e7d87564fc2a9e19ab4b9d8ca00857468d5ec984425820749576b366
Next block: 51ed509f4be448e3c4a03654710973f56df38be91993786997f15caaa4de2218
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159205
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 4186d8bad0badf5baae7e025f8f2970948981249e8e4cd238bbfdbba76b30576
Median time: 1719159204
Difficulty: 4.656542373906925e-10
Confirmations: 555
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d34
Bits: 207fffff