14 · Shipping & Collaboration
DNS
Domain Name System
The internet’s phone book: it turns a name like `atlasscope.works` into an IP address machines can reach. Deploy and domain bugs are often DNS, not app code.
Concrete example
Pointing a domain at Vercel is a DNS change (A/CNAME records).
Why it matters
Why a deploy can be “live” while the custom domain still fails.