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: 1618
Hash: 5a438cd74f95235ee4cd5bd33c7f827312fec23475ebd82a6f947d929c53b2df
Previous block: 1cd26580e04db413daaf0aca7ab17c068c886939f5514f45786f2f4c9f02b062
Next block: 025313e1674e5d25a4c96bf173bac9c572d264e842086f5ebd29b59551a8efdb
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159193
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 1bf811c22c6c2a668448b922902e5f7e23730bc082acdaec990c360602a9c966
Median time: 1719159192
Difficulty: 4.656542373906925e-10
Confirmations: 626
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ca6
Bits: 207fffff