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: 557
Hash: 32d94fd3dfa502d53f303fa0e2a65efd0a0f41a64d98eb91857017bd8d7debde
Previous block: 01fd5c603c4d971388e7bbbe88f87d27eb8bd30cb02ae913dbb300e4b4e85445
Next block: 6665a530ab60e4d159367b7733949473ceefea9ca8f0d38da3f3ad1f821b2d04
Weight: 948
Versionhex: 20000000
Version: 536870912
Time: 1564711422
Stripped size: 228
Size: 264
Nonce: 2
Merkle root: 02871ab47cb12c6a899f377180b4bf8c9a910e31cba18a374a0a6267a1fa2c4a
Median time: 1564711421
Difficulty: 4.656542373906925e-10
Confirmations: 47
Chainwork: 000000000000000000000000000000000000000000000000000000000000045c
Bits: 207fffff