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. mkrgsKuFE

Height: 170
Hash: 7db19868f68863c3f1b2e90a2036c6516ef958b9894d38d545e426441eefcd1d
Previous block: 1027a261def9f27965788bf3167cbeb4c2bb961b846bbffef1647a0f1388af0b
Next block: 30c783518185a9c19d327835536bfa1fd3ce0baaadfc1ef76660a8f86088f9a9
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074762
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 904901fd548e32a9b1a758928f4a1202ad3e5bc466b8f2c46492f1366939a4cd
Median time: 1544074761
Difficulty: 4.656542373906925e-10
Confirmations: 32
Chainwork: 0000000000000000000000000000000000000000000000000000000000000156
Bits: 207fffff