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: 181
Hash: 220e0365e5f4a12645bad0e44d2c0e6cbe179f445e9c40720c45504582a58ee1
Previous block: 71c08f98ecf07ac72993974f5dcceaca3ae39d8f499e6d94b8d98425f0038d7c
Next block: 69f5b1cda50170f75f9058f652623dd611b917eb71fce751b9271282a6ddc8cf
Weight: 912
Versionhex: 30000003
Version: 805306371
Time: 1544074763
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 4cf97670ff93980785f4347127053eb41a89c0b69b9d5d70b283673141fa92d6
Median time: 1544074763
Difficulty: 4.656542373906925e-10
Confirmations: 21
Chainwork: 000000000000000000000000000000000000000000000000000000000000016c
Bits: 207fffff