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: 1668
Hash: 28570e18c3e5fa64f3aede858f89adec7d7c4c1dd94b213f9180bed42515841d
Previous block: 27507bd3ce0a328d8ab27f0ec749501e3d9a7aef24c1061fa193d80a10a24099
Next block: 1f620ffaf9e629e133219813bc6d2d820f178ce5c66410645f5377c3eab3714e
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159201
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 7aec40f77bf846c7982341b197082b903426ce9967f49a63d2db4f962b8dc66f
Median time: 1719159200
Difficulty: 4.656542373906925e-10
Confirmations: 576
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d0a
Bits: 207fffff