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: 1720
Hash: 61555c82b8c96e3a10203be3847727d2ffb2e9dbe63d875b0a19fdec43780096
Previous block: 169a9b1b383f026cb3f5639b47abb8572ee986f1306150ebc6d297d954991e03
Next block: 2878f7f09ea9d6b918247c43daacf60fe7fe7034ed2b86298243039042503d28
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159210
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 0061dfde5a2d4c1221f674abe0f0b8276f3e688c90fa356f2a34e16fe10162f7
Median time: 1719159209
Difficulty: 4.656542373906925e-10
Confirmations: 524
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d72
Bits: 207fffff