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: 2400
Hash: 13741cefcba41c35fff6c69e66c41ee9f5ad078e4ff9f4fa45f1534361c288bd
Previous block: 4ec1df3aa3db5dcb73821b133b148c1e77156580e1b77ad4d971afedc44494ce
Next block: 7232decf629c4cce855c2d6d56f4dbf5078a6ca9e4abe85dd85dd16b176eb675
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847287
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: f942af3ad7abeb73add28af39bf11c8c7e6d36f1a7582fa4d949ae8b86c65a29
Median time: 1743847286
Difficulty: 4.656542373906925e-10
Confirmations: 243
Chainwork: 00000000000000000000000000000000000000000000000000000000000012c2
Bits: 207fffff