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: 1819
Hash: 742b8a93aff9f808f93f5acee30b9658631e1236145cd29f9339a162df445425
Previous block: 51662eeedbf0856ddd1d313530c449c10574d4948a2f814061fde81819d4ca85
Next block: 7293d713088ca29672070b6eb966c90cd78104bf37767a0f77bd0c5912615697
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159226
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: e2fb18f9a6feb20cbc2b5d4034430b2d2cf4334f24ddfba13ee9a0fab6b0bd04
Median time: 1719159226
Difficulty: 4.656542373906925e-10
Confirmations: 425
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e38
Bits: 207fffff