Worked on the is-a-dev/register repository to address a critical DNS CNAME routing issue affecting multiple subdomains. The primary focus was on updating DNS configurations to ensure that user domains correctly pointed to new Vercel hosting URLs, minimizing service disruption during the migration. This involved careful domain management and verification of routing alignment across all impacted subdomains. The solution was implemented through a targeted commit, leveraging skills in DNS configuration, domain management, and web development using JavaScript. The work demonstrated attention to detail in infrastructure updates, ensuring seamless domain routing and maintaining reliable access for users throughout the transition period.