Which chain is HNT in?

Could you please clarify for me which blockchain network does HNT operate on? I'm trying to understand the technological infrastructure behind this cryptocurrency and its integration within the broader blockchain ecosystem. Could you also provide any insights into the specific advantages or unique features of this chain that might make it suitable for HNT? Additionally, is there any information available about the interoperability or cross-chain capabilities of HNT with other blockchain networks? Thank you for your assistance in helping me better understand this topic.