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: 1746
Hash: 6e80015ffaa2e6a302ca9edfd7867922712d4393646af3eb6697d459677bcc93
Previous block: 158cd4490a299853445e00269f688aeac4bd1ff945f29445a0ced10f4de5d611
Next block: 2a5c43be6037f69fe2e1ae7312df6fdefdf6def8fd78a7619ab122c4f23c79ce
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159214
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 311bfdadf5cdf92f58e641a7f3d416966897f0e1ea2dd19dd429b7007d397b4b
Median time: 1719159213
Difficulty: 4.656542373906925e-10
Confirmations: 498
Chainwork: 0000000000000000000000000000000000000000000000000000000000000da6
Bits: 207fffff