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: 1620
Hash: 353beda755ed8f61c556e3e51f414866af2e3786f4d5e534b69876237a83daf2
Previous block: 025313e1674e5d25a4c96bf173bac9c572d264e842086f5ebd29b59551a8efdb
Next block: 50ec08b123a0400aeafaaf2c0c1fbf50f1fd938cfb1ce82aafbc846fe041460e
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159193
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 7a7c0c7a3bdf937e4c67b5f68750112a6c3185bd6d568f18f0de25d8a08832a0
Median time: 1719159192
Difficulty: 4.656542373906925e-10
Confirmations: 624
Chainwork: 0000000000000000000000000000000000000000000000000000000000000caa
Bits: 207fffff