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: 165
Hash: 55267f693fe825c33ceae72a7b7329a15cdd559c9d60c35af8801752ce9329f3
Previous block: 4e0e1955011c7009eae65c1796f66b86d5d1f9862815b777a08a2159e553d877
Next block: 751b7631e06fbf5b2be298de502bbeafb53436a0a71c5751c1cb041b209355da
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074761
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 2617c6efac0bbefb4b75c2cd5a885df99326bec126cc9a4088ddb4490ab9fee7
Median time: 1544074760
Difficulty: 4.656542373906925e-10
Confirmations: 37
Chainwork: 000000000000000000000000000000000000000000000000000000000000014c
Bits: 207fffff