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: 1638
Hash: 2885b1ead60527b42894d5dbea388662f8733c4f269600f23156806229099966
Previous block: 7f20be65e31b2aff40b29e220cab9472068f741bf4842fe0786d973c358045ce
Next block: 4042d39d367f86fb6b31e880c119fdc6247598199aac0b9cc64e27f1a5069e07
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159196
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: ad7c04349266fc88cf9a049658bed4ce0ac04ea2c921abef6187f156baa215eb
Median time: 1719159195
Difficulty: 4.656542373906925e-10
Confirmations: 606
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cce
Bits: 207fffff