---
title: Supported DNS Record Types (DNS RR types)
description: Learn about DNS record types supported by OpusDNS, including A, AAAA, MX, CNAME, TXT, and advanced records like SRV, TLSA, and SVCB, with clear explanations and examples.
---

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June 15, 2026

# Supported DNS Record Types (DNS RR types)

### What are DNS Record Types?

DNS record types define the kind of information stored in a DNS zone and how a domain behaves on the internet. Each record type serves a specific purpose, such as pointing a domain to an IP address, configuring email delivery, enabling security features, or defining service routing rules.

When a domain is queried, DNS resolvers use these record types to determine how to handle the request.

### Supported Record Types

At OpusDNS we support the following DNS Record Types:

- A
- AAAA
- ALIAS
- CAA
- CNAME
- DNSKEY
- DS
- MX
- NS
- PTR
- TXT
- SOA
- SRV
- TLSA
- SMIMEA
- URI
- HTTPS
- SVCB
- NAPTR
- SSHFP

### Usage Guide, Examples and Formats

Below you’ll find a short explanation and example format for each supported record type.

#### A Record

Maps a domain to an IPv4 address.

Example:

- Name: `example.com`
- Value: `192.0.2.1`

 

#### AAAA Record

Maps a domain to an IPv6 address.

Example:

- Name: `example.com`
- Value: `2001:db8::1`

 

#### ALIAS Record

Allows a domain to point to another hostname at the zone apex (similar to CNAME but for root domains).

Example:

- Name: `example.com`
- Value: `example.net`

 

#### CAA Record

Specifies which certificate authorities are allowed to issue certificates for the domain.

Example:

- Name: `example.com`
- Value: `0 issue "letsencrypt.org"`

 

#### CNAME Record

Maps a domain or subdomain to another hostname.

Example:

- Name: `www`
- Value: `example.com`

 

#### DNSKEY Record

Holds the public key used in DNSSEC for verifying DNS data.

Example:

- Managed automatically or provided by DNSSEC configuration.

 

#### DS Record

Delegation Signer record used in DNSSEC to link parent and child zones.

Example:

- Name: `example.com`
- Value: `12345 8 2 abcdef...`

 

#### MX Record

Defines mail servers responsible for receiving emails.

Example:

- Name: `example.com`
- Value: `10 mail.example.com`

 

#### NS Record

Specifies authoritative nameservers for a domain.

Example:

- Name: `example.com`
- Value: `ns1.opusdns.com`

 

#### PTR Record

Used for reverse DNS lookups (IP → domain).

Example:

- Name: `1.2.0.192.in-addr.arpa`
- Value: `example.com`

 

#### TXT Record

Stores arbitrary text data, often used for verification or email security.

Examples:

- SPF: `v=spf1 include:_spf.example.com ~all`
- Verification: `google-site-verification=abc123`

 

#### SOA Record

Start of Authority record containing zone metadata.

Example:

- Primary NS, admin email, serial number, refresh timers.

 

#### SRV Record

Defines service locations (host and port).

Example:

- Name: `_sip._tcp.example.com`
- Value: `10 60 5060 sipserver.example.com`

 

#### TLSA Record

Used for DANE, linking TLS certificates to DNS.

Example:

- Name: `_443._tcp.example.com`
- Value: `3 1 1 abcdef...`

 

#### SMIMEA Record

Used for binding S/MIME certificates to a domain.

Example:

- Name: `user._smimecert.example.com`
- Value: hash of certificate

 

#### URI Record

Maps a domain to a URI.

Example:

- Name: `_service.example.com`
- Value: `10 1 "https://example.com/service"`

 

#### HTTPS Record

Defines HTTPS service parameters and endpoints.

Example:

- Name: `example.com`
- Value: `1 . alpn="h3,h2"`

 

#### SVCB Record

Service Binding record used for advanced service configuration.

Example:

- Name: `example.com`
- Value: `1 example.com alpn="h2"`

 

#### NAPTR Record

Used for dynamic service resolution (often in VoIP systems).

Example:

- Name: `example.com`
- Value: `100 10 "u" "E2U+sip" "!^.*$!sip:info@example.com!" .`

 

#### SSHFP Record

Stores SSH public key fingerprints for server verification.

Example:

- Name: `example.com`
- Value: `1 1 <hash>`

 

 

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