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: 1587
Hash: 398fd890f2a7b94eac2961b91717b85b876f80807d81bb55f47c48340d2c450d
Previous block: 57c4cfe1c7ce7dc61304434084327bceb851a6063eb3dd8a60c47795945a4fa6
Next block: 4a022abe2b1ca7aabbc95a26c164f420f081e26cbc36a94d7a4eb8e4f5bc2bbd
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697672
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 4a10341d29cf692b757239cd8218ae153dcb2bd454353000f41e8798e9fa8006
Median time: 1718697671
Difficulty: 4.656542373906925e-10
Confirmations: 657
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c68
Bits: 207fffff