Developed and deployed a subdomain provisioning system for nez.is-a.dev within the is-a-dev/register repository, focusing on automated domain management and DNS configuration. Leveraged JSON to standardize domain settings, enabling consistent subdomain routing and streamlined DNS verification processes. The implementation included configuring DNS records, such as verification entries and an A record pointing to the appropriate server, to ensure secure and reliable domain resolution. This work improved operational consistency and enhanced the security posture for customer-facing subdomains. The approach emphasized clear commit traceability and maintainable configuration, utilizing skills in DNS management, domain provisioning, and JSON-based infrastructure as code practices.