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

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mressCpnG

Height: 164
Hash: 4e0e1955011c7009eae65c1796f66b86d5d1f9862815b777a08a2159e553d877
Previous block: 0f69b25a1f00a35939424a15d9591016a6dd8fdd7f92de8aef7dbea8a188a9f1
Next block: 55267f693fe825c33ceae72a7b7329a15cdd559c9d60c35af8801752ce9329f3
Weight: 912
Versionhex: 30000003
Version: 805306371
Time: 1544074761
Stripped size: 228
Size: 228
Nonce: 3
Merkle root: 69095c921b15e70df765654c16d179b05f71881f7fa028562a8f84786708d053
Median time: 1544074760
Difficulty: 4.656542373906925e-10
Confirmations: 38
Chainwork: 000000000000000000000000000000000000000000000000000000000000014a
Bits: 207fffff