Record Set

Overview

A record set provides information about a domain name, including the IP addresses associated with and how to handle requests for the domain name and its subdomains.

If you have created a zone on the DNS console, you can add record sets to define how you want to route traffic for the domain name or its subdomains.

Table 1 describes the record set types and their application scenarios.

**Table 1** Record set usages
Type	Description
A	Maps domains to IPv4 addresses.
CNAME	Maps one domain name to another domain name or multiple domain names to one domain name.
MX	Maps domain names to email servers.
AAAA	Maps domain names to IPv6 addresses.
TXT	Creates text records for domain names. TXT record sets are usually used in the following scenarios: To record DKIM public keys to prevent email fraud. To record the identity of domain name owners to facilitate domain name retrieval.
SRV	Records servers providing specific services.
NS	Delegates subdomains to other name servers. This type of record set is created by default and cannot be added manually.
SOA	Identifies the base information about a domain name. The SOA record set is automatically generated by the DNS service and cannot be added manually.
PTR	Maps IP addresses to domain names.

Usage

Record sets are used in following scenarios:

Private domain name resolution
On a private network, A and AAAA record sets translate private domain names into private IP addresses.

Figure 1 Private domain name resolution
Reverse resolution on a private network
PTR records translate private IP addresses into private domain names.

Figure 2 Reverse resolution on a private network