This host is an Electrum server for Bitcoin. It is powered by the same indexer as mempool.bitmixlist.org.
In Electrum, use a custom server:
electrum.bitmixlist.org:50002:s
Operated by Ali Sherief (@Zenul_Abidin). Donations: bc1q4djl6pxt90nfs8fufdul26ufxukxxrczsfjj0h