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: 1528
Hash: 2b849dc79097ee3a7b95874a4b434441634610e38c4f316f069a5a2c348b3801
Previous block: 487190204ec18c40ffdeabfb98ad15bd05b26c25825ec82d3d7a6079166e4183
Next block: 1b798ef1171f8ee15ebd2071358a4a06279ee19e7180903a33fda53055ebfe0f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697662
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 80f73816ba0d9958d2fd3b1887b7eabdd058f189c797469b5ec640d643db53d5
Median time: 1718697661
Difficulty: 4.656542373906925e-10
Confirmations: 716
Chainwork: 0000000000000000000000000000000000000000000000000000000000000bf2
Bits: 207fffff