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: 6
Hash: 6c9fd2bd32d1d897929cb4c9cc3fb80bd4f56bb6cfe10fcf3640bfa2d42b1db8
Previous block: 66474786c9acac43105951648370eaa9da8598c7c54327215bb58adae967ecf4
Next block: 3f46a2df37bce0b13d1eda674b56d1474922a080fb814b62192da0d26c40c46a
Weight: 904
Versionhex: 20000000
Version: 536870912
Time: 1544074734
Stripped size: 226
Size: 226
Nonce: 0
Merkle root: 836851b0ea007cf131d666b5d4d87238252398db8a5399bfa9cc54d618b79ff3
Median time: 1544074733
Difficulty: 4.656542373906925e-10
Confirmations: 196
Chainwork: 000000000000000000000000000000000000000000000000000000000000000e
Bits: 207fffff