Running a Free Domain Infrastructure Serving 400,000 Users

I was 15 when I registered a four-letter domain name that no one had claimed. I used my savings to buy it, simply wanting to experiment with something interesting. I did not expect it to grow into a public domain infrastructure serving hundreds of thousands of users worldwide. The idea started casually. A friend asked if they could use a subdomain under my newly registered domain. That question led me to open it to others for free, which became the US.KG Domain Registry and later expanded into a broader open infrastructure initiative under DigitalPlat Foundation. There was no ready-made system designed for managing large-scale subdomain registrations. Public DNS providers imposed limits, and existing CMS tools were not built for this kind of dynamic delegation. I deployed BIND9 on a small VPS and built a custom management layer using Python and Flask, integrating it directly with the DNS backend. Within months of launching, registrations grew quickly through organic sharing in develope