deexamplecom

Deexamplecom is a placeholder domain name used in technical documentation, tutorials, and example configurations to illustrate how domain names and related internet services work. It is not intended to correspond to a real, publicly resolvable site and is typically not registered for production use. The name is chosen to resemble a typical domain while avoiding real ownership or traffic.

Uses and context: In instructional material, deexamplecom may appear in examples of DNS records, such as A, AAAA, CNAME, MX, and TXT entries, or in demonstrations of hosting setups, redirects, and SSL/TLS configuration. It is commonly paired with mock IP addresses or local testing environments, allowing readers to study procedures without impacting live domains.

Origin and conventions: Placeholder domains are a common practice in networking and software documentation to prevent accidental interactions with active services. While example.com and other example domains are defined in official RFCs for documentation purposes, deexamplecom is not an official reserved name but functions as a practical stand-in in many teaching resources.

Limitations: Because deexamplecom is not guaranteed to resolve on the public Internet, any live attempt to reach it will fail unless the domain is created and configured in a controlled environment. Users should replace it with a real domain when applying the lessons to production systems.

See also: Domain name, DNS, HTTP/HTTPS, SSL/TLS, RFC 2606, RFC 6761.