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: 1550
Hash: 53042c5325924b5f370717650f464afd0c089f0371583848d2c62398fafe985c
Previous block: 6c9f85739ac36fa8a85b89b85b434ad68b1ffa648091443cc4857cfa13b65b90
Next block: 288f89ec751d2c72cfdb9ca1473dd3cfebb8766c474deabefdf01832f3700be1
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697666
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: ad6b81e2577d1d2d1413ed9f8b2c37cb10580532e8e88fee85f174018097a864
Median time: 1718697665
Difficulty: 4.656542373906925e-10
Confirmations: 694
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c1e
Bits: 207fffff