GeoDNS
DNS that returns different IP addresses based on the geographic location of the requester. Routes users to the nearest data center for lower latency.
What is GeoDNS?
DNS that returns different IP addresses based on the geographic location of the requester. Routes users to the nearest data center for lower latency.
GeoDNS is a foundational concept that sits in the Load Balancing & Proxies area of system design. Engineers reach for it whenever they need to reason about real-world trade-offs in that space — not just for textbook correctness, but because real production systems at companies like Netflix, Amazon, and Google make these decisions every day.
If you want to go deeper than this definition — with diagrams, code, and a quiz to lock it in — work through the "GeoDNS" lesson linked below. It walks through the why, the mechanism, the trade-offs, and how the giants actually use it in production.
Learn GeoDNS in depth
Full interactive lesson with diagrams, code examples, real-world references, and a quiz.
Open the GeoDNS lessonSee also
Related glossary terms you might want to look up next.
DNS
The phonebook of the internet. Translates human-readable domain names (google.com) into IP addresses that computers understand.
Global Load Balancer
A load balancer that routes users to the nearest data center or region based on geography, latency, or health. DNS-based (Route 53, Cloudflare) or anycast-based.
CDN
A network of servers distributed globally that caches content close to users. Netflix uses CDNs to stream video from servers near you, not from one central location.