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AIvikings Glossary

Fully Qualified Domain Name

A fully qualified domain name, or FQDN, is the complete domain name that identifies a specific host in DNS.

Last updated July 24, 2026

Quick summary

Term: Fully Qualified Domain Name
Plain-English definition: A fully qualified domain name, or FQDN, is the complete domain name that identifies a specific host in DNS.
Technical definition: A fully qualified domain name, or FQDN, is the complete domain name that identifies a specific host in DNS.
Commonly confused with: FQDN
Related terms: Hostname, Subdomain, DNS

Definition

A fully qualified domain name, or FQDN, is the complete domain name that identifies a specific host in DNS.

Why it matters

FQDNs remove ambiguity when configuring DNS and services.

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