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: 2145
Hash: 5c4e540a5ed833cafb5a22132db3a6e9c71a652a15b9508664cbe3678657ba54
Previous block: 6571052f52310defd84768153c0dc87bc5522224096ef82c89b61399073fec2e
Next block: 21accf491851720a73c038f8dd62ce41b84c83ac2937653c0556946a7e93e990
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964794
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 04085ff0d28cc1fd25bb62436136acbba73e5d25b554f94aa7923242296a57ee
Median time: 1728964793
Difficulty: 4.656542373906925e-10
Confirmations: 99
Chainwork: 00000000000000000000000000000000000000000000000000000000000010c4
Bits: 207fffff