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: 561
Hash: 1b110ff1e6d2bde25099fbf605f3f4668d4d3e1265f180824ccda9542d57a959
Previous block: 3b47b7d077a8dccd5f428c0ed62865b3d9d933a167d4d2b04301b8eff702b35e
Next block: 67b8c2727eeccc4526af0033085f3f09030b2b85a85868b9d399f3e18d2346e3
Weight: 948
Versionhex: 20000000
Version: 536870912
Time: 1564711422
Stripped size: 228
Size: 264
Nonce: 0
Merkle root: dcbb45bcc7d868e6a600d297186bc60a4a7b428db96854a2315ed629ef450ac2
Median time: 1564711422
Difficulty: 4.656542373906925e-10
Confirmations: 43
Chainwork: 0000000000000000000000000000000000000000000000000000000000000464
Bits: 207fffff