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: 1254
Hash: 5bf987c1755dc92e09dad091375ce3e42d042818476760574f2970edbb217e9c
Previous block: 5915720c13c9d66991a10dffa7399bc39b8328c60d541112114bfe76bd6bf039
Next block: 5cbff367904675f64c13bbb29331c790b557a917982468ceb07ea87377ec0957
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697616
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 640aee84c3d9893b3430832c11aba98473e401677250b07a0101f7e27ed36ad1
Median time: 1718697616
Difficulty: 4.656542373906925e-10
Confirmations: 990
Chainwork: 00000000000000000000000000000000000000000000000000000000000009ce
Bits: 207fffff