---
id: "resolver"
kind: "glossary-term"
title: "resolver"
language: "en"
category: "DNS and technical foundations"
updated: "2026-10-04T14:01:23Z"
canonical: "https://tldlog.com/glossary/resolver/"
translations:
  es: "https://tldlog.com/es/glosario/resolutor/"
  de: "https://tldlog.com/de/glossar/resolver/"
  fr: "https://tldlog.com/fr/glossaire/resolveur/"
  it: "https://tldlog.com/it/glossario/resolver/"
  pt-BR: "https://tldlog.com/pt/glossario/resolvedor/"
  ru: "https://tldlog.com/ru/glossariy/rezolver/"
  zh-Hans: "https://tldlog.com/zh/cihui/jiexiqi/"
---

# resolver

A DNS server, often run by an internet provider or a public DNS service, that finds the answer to a domain name lookup for users. It asks the root, TLD and authoritative servers in turn, then saves answers for a time set by the TTL.

## related terms

- [authoritative server](https://tldlog.com/glossary/authoritative-server/)
- [TTL](https://tldlog.com/glossary/ttl/)
- [root server](https://tldlog.com/glossary/root-server/)
- [DNS](https://tldlog.com/glossary/dns/)