---
title: DNS
description: Optional DNS services and record types for your domains.
---

Futrou offers optional DNS services you can use for your domains. If you want to use our DNS servers, you can set them up with your domain registrar.

## DNS zone

A DNS zone is a set of records that defines how a domain and its subdomains should behave. A zone contains various record types that determine where requests for that domain should be routed.

You can manage a DNS zone in [Administration](https://old-app.futrou.com), on the serverlet's DNS tab.

## DNS records

DNS records are individual entries in a DNS zone that define specific domain behavior. Each record has a type, a name, a value, and a TTL (Time To Live).

**Tip:** After changing DNS records, it can take anywhere from a few minutes to a few hours for the changes to propagate across the internet. This depends on the TTL value and how long DNS servers cache the old records.

### Supported record types

- **A record:** maps a domain name to an IPv4 address.
  Example: `mojedomena.cz.     IN      A      159.69.119.71`

- **AAAA record:** maps a domain name to an IPv6 address.
  Example: `mojedomena.cz.     IN      AAAA   2a01:4f8:c010:d03::1`

- **CNAME record:** creates an alias from one domain name to another. Can't be used for a domain's apex record, only for subdomains.
  Example: `www.mojedomena.cz.     IN      CNAME  mojedomena.cz.`

- **MX record:** specifies the mail servers that accept email for a domain. Each MX record also has a priority (a number), where a lower number means higher priority.
  Example: `mojedomena.cz.     IN      MX      10  mail.mojedomena.cz.`

- **TXT record:** stores arbitrary text information. Often used for domain ownership verification, SPF records, DKIM keys, and other purposes.
  Example: `mojedomena.cz.     IN      TXT     "v=spf1 include:_spf.google.com ~all"`

## TTL (Time To Live)

TTL determines how long DNS servers can cache a record before requesting its current value again. A lower TTL means more frequent updates, but also more load on DNS servers. The default TTL is usually 3600 seconds (1 hour).