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. mupBAc74k

Height: 2251
Hash: 294e695ff6d2548d2a529c9a7ccd64e7c3a1267eb53371e262608ae3b06b57a7
Previous block: 672321364e260ae0cf2a1fe92e0bde2a59546a9115ac821a9347efa1937e6224
Next block: 77c7171448d9cae65385fa62859e481b262c9a0d0038c8633c172ae3d3737b99
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719480984
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: f5c804d709bf8d59aa08376f217925935c328729a0f4d8fa6156fe28a9bf27c1
Median time: 1719480984
Difficulty: 4.656542373906925e-10
Confirmations: 41
Chainwork: 0000000000000000000000000000000000000000000000000000000000001198
Bits: 207fffff