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. mzaGu

Height: 585
Hash: 13220d6a83dc763f9101613724e180acce5394670bd2ab4be5c87bafd8ac65f5
Previous block: 09d7a0ca89f5b529f79faf96cfcc03203140ea864e409ad82aee9bc126c5bdde
Next block: 1310f0406327417f8308c71a78c78228964e6ad2e4afbc46cff41328f500606e
Weight: 948
Versionhex: 20000000
Version: 536870912
Time: 1564711426
Stripped size: 228
Size: 264
Nonce: 0
Merkle root: e91451dc7b88d279c617eb8320250c8148177efa8fdcc53aea8927ae8c390521
Median time: 1564711426
Difficulty: 4.656542373906925e-10
Confirmations: 19
Chainwork: 0000000000000000000000000000000000000000000000000000000000000494
Bits: 207fffff