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: 1723
Hash: 7066f43ab02ee95321c67f02d323692cd053cfa210f14ac9ff522dac6ecc6191
Previous block: 5e40602f84941f71650cce77c99feb236e7a6292f8d5d6afef45f524221c958c
Next block: 2c11a70398d650c2d7eba7da2de772d77a14f5a7705de7d1b16274434059a190
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159210
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 16e4215d7a574e11275c9478d90f6fe8e953fe746ba88aefa46c30095111b390
Median time: 1719159210
Difficulty: 4.656542373906925e-10
Confirmations: 521
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d78
Bits: 207fffff