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: 1661
Hash: 70b83d3d791b910ed6e10d2357df4599c1968c5b643d07e37f8afc7f72870be8
Previous block: 2e6c77549c39405b9f4a028af5ba50f407695cde10a739565577c4ce64c5afe4
Next block: 5f34af82fb8679db99e98cae4473611ccbdbe0da8c7a4ad7fa94b927e1be37f4
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159200
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 9bbacb6b0c0211b99024cfd59c3543e47d77d66d3e92c44c429ba213cb4817f0
Median time: 1719159199
Difficulty: 4.656542373906925e-10
Confirmations: 583
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cfc
Bits: 207fffff