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: 1641
Hash: 00f5fc211de432412355fcafd5add6439afb332d066ac24a68f1939dff2b59d1
Previous block: 7ddfb0bcc23a4cf58646d01283d3b30912b596a6dca7bcc2a7881ff2606d591d
Next block: 4a7fe03e0fbb2c339e85a71615700987974db123b49a8caaba6b0d3ed88390ab
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159197
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 8f2444d02b6cf70ddd1d1f325a1246239f02994243485ea81faccf022732e148
Median time: 1719159196
Difficulty: 4.656542373906925e-10
Confirmations: 603
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cd4
Bits: 207fffff