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: 1574
Hash: 17575fcbe40fe182210d9a720d3e0acb5f82c7d311ee89b4dcc281b072c8d0b8
Previous block: 678e4067700a139f976ad88373bc74d2bedf3242292e761729ca44d481179a96
Next block: 642e006b151229308b8ce5af8c76ab5dad68011c7628434977e75ced1f9e0c84
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697670
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 6d2075c31fbfe844133df96aa2a96be730a12e38da3f6c9240f477bfac7cfdca
Median time: 1718697669
Difficulty: 4.656542373906925e-10
Confirmations: 670
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c4e
Bits: 207fffff