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: 1242
Hash: 6dd82fe8539d899c21f7410133c73f7ccafa28ba362e67807a193ecbd10ffa2c
Previous block: 3a8676fb371a14466dae1e280b2a91ac9893fecbdaf3fb6c40128251aeb42348
Next block: 4886c27c66934a035d96e29c0ce154daf0f881ca92f57e02f5856a86396c0e32
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697614
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 5f97cb2f2dae9eda6a901ad1426aebadc2976cfd314284ec2e32f7e1b45f4f77
Median time: 1718697614
Difficulty: 4.656542373906925e-10
Confirmations: 1002
Chainwork: 00000000000000000000000000000000000000000000000000000000000009b6
Bits: 207fffff