AWS Route 53

Route 53 is Amazon's managed DNS and traffic management service, and it sits at the foundation of a substantial fraction of the internet's DNS infrastructure. Named for the TCP/IP port used by DNS, Route 53 handles authoritative DNS for millions of domains, health-check-based routing, latency-based routing, geolocation routing, and weighted record sets that enable sophisticated traffic distribution patterns. Many of these routing policies interact with Route 53 health checks — automated probes that verify whether an endpoint is responding — so a health check misconfiguration or health-checking service failure can cause DNS responses to change in ways that redirect traffic unexpectedly.

Route 53's anycast network propagates DNS responses through a distributed network of points of presence worldwide, ensuring that resolver queries reach a nearby Route 53 server rather than routing to a centralised region. Zone changes — adding, modifying, or deleting DNS records — propagate through the Route 53 network and out to the global caching resolver infrastructure within seconds to minutes, depending on the existing TTL of affected records. The Route 53 console and API are hosted in us-east-1, making that region particularly significant; a control plane incident in us-east-1 can prevent zone changes from being submitted even if the Route 53 resolver network continues to serve existing records correctly.

A Route 53 degradation event has consequences that extend far beyond AWS customers' own services. Because Route 53 serves authoritative DNS for so many high-traffic domains, resolver failures or incorrect responses cascade to every application that depends on DNS resolution to reach those services. Sites go unreachable not because their web servers are down but because DNS answers for their domains are unavailable or incorrect. Health-check-driven routing policies that fail open rather than closed can send traffic to unhealthy endpoints. The scale of Route 53's footprint means its incidents reliably produce widespread internet disruption reports within minutes of onset.

Outage.gg tracks Route 53 status through community reports from AWS customers and developers. If DNS resolution is failing, zone changes are not propagating, or the Route 53 console is unreachable, the live status page shows current incident impact.