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. mkrgsKuFE

Height: 563
Hash: 0dfff6dcaf35e61bb134de7cfbeea6e835148d490b2a8f1d6cf70233bae4f5a1
Previous block: 67b8c2727eeccc4526af0033085f3f09030b2b85a85868b9d399f3e18d2346e3
Next block: 3f4f60d898e23840690ce2ad2a54d515d1a17adddcb6f6058fbf3e5e20edaec4
Weight: 948
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1564711423
Stripped size: 228
Size: 264
Nonce: 0
Merkle root: 297f30c66b8439431454d5a10027fe9e23952d2d1e089570a47e38cd680d756e
Median time: 1564711422
Difficulty: 4.656542373906925e-10
Confirmations: 41
Chainwork: 0000000000000000000000000000000000000000000000000000000000000468
Bits: 207fffff