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: 175
Hash: 610d2a93770c83fb627c50b63274e90d42f27eed2a53ac37e0d8c6da1adf21a0
Previous block: 52557e1533f06fe55679404efff0a7b00c52363c1b8d79a9124d03eb80e9644d
Next block: 205c40da644a8eb71235684bdf3e94af54e7431a5d6a711482d32686b2ec7cc0
Weight: 912
Versionhex: 30000003
Version: 805306371
Time: 1544074762
Stripped size: 228
Size: 228
Nonce: 2
Merkle root: e28948d0d4f18b830b197c9665ac58001dd6f8fe1b9bf4a23f17abc36c6cfbec
Median time: 1544074762
Difficulty: 4.656542373906925e-10
Confirmations: 27
Chainwork: 0000000000000000000000000000000000000000000000000000000000000160
Bits: 207fffff