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: 183
Hash: 452d82d842cb948831c808894452af2f8a82ca0d67ae74c96b09492a303cb739
Previous block: 69f5b1cda50170f75f9058f652623dd611b917eb71fce751b9271282a6ddc8cf
Next block: 090590024a081cbe97b061a0bbea2ec2f579e58e8f35eeecb636a55d647d11b7
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074764
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 277dc39800ebd0cb9282a57fd136372aef5a3001b035855dc2a5d96b376c4ec6
Median time: 1544074763
Difficulty: 4.656542373906925e-10
Confirmations: 19
Chainwork: 0000000000000000000000000000000000000000000000000000000000000170
Bits: 207fffff