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.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 1658
Hash: 62d4391e784e5080dc81694dbadf2685414e1a1050746a3d29d1b3b22f9ec34a
Previous block: 0ec58f9bdbed1759f871e9bf9df633de8db08fbd492034253784e356ac1fa16e
Next block: 6a1808b469947dda1fcd1ec799c7148a7056f2a9b69665cacd314eea57d028f2
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159200
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 2133d0aef63f04e9d8729e97f9167cd2b7619b2f02ec687afcb5efc79fa27bfd
Median time: 1719159199
Difficulty: 4.656542373906925e-10
Confirmations: 586
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cf6
Bits: 207fffff