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: 1671
Hash: 48e0c985a4fe819a5f8f9ae0462a984fe0e14b880c6eb5ce63c91a15e695de1c
Previous block: 5f337606d9153be5788db65f89695e9304a4c3b53572578db2f38b093dfe3d1f
Next block: 15f1dd5b5317d091a03489f497f25b4f6306d7dc0966d9a5d06921ebfefe1b4a
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159202
Stripped size: 218
Size: 254
Nonce: 5
Merkle root: 4281a43aee793f54e90f14e03f13b367d5c7a8d1992cbee23c29512338727c4e
Median time: 1719159201
Difficulty: 4.656542373906925e-10
Confirmations: 573
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d10
Bits: 207fffff