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: 1686
Hash: 1809b64e30b59f001a7c274788c9073eee98718f7f34a4253febf3a7f191f11a
Previous block: 3a28e443844c3fe1f3504305f019a710aadb8279c2ecc211ab3f71ce957942d7
Next block: 4f2101b299ec3a28b9dc6aa8355d92775050ddc6c99feb06a064f2243fc6d6f7
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159204
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 339f2682769ed638865c627c136edfbde75bcbcef5bc5180a4c0556e9fd53fe4
Median time: 1719159203
Difficulty: 4.656542373906925e-10
Confirmations: 558
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d2e
Bits: 207fffff