What are A (Address) Records?
A records map an FQDN (fully qualified domain name) to an IP address and are the most used record type in any DNS configuration. A records can be configured in a domain for a specific host such as www.example.com or for the root record (sometimes represented with an @ symbol) of a domain such as example.com.
A RECORD FIELDS
|A) Name||This is the host name for the record, typically a computer or server within your domain. Your domain name is automatically appended to the end of the “Name” field. For example, if you create a record with the name “www” the record would be defined as “www.example.com”. If the “Name” field is left blank, then it represents the root record of the domain. The root record for the base domain can also be referred to as the apex record and is represented using an @ symbol in some documentation.|
|B) TTL||The TTL (Time to Live) in seconds is the length of time the record will cache in resolving name servers and web browsers. The longer the TTL, then remote systems will lookup the DNS record less frequently. Your nameservers will also receive less query traffic since most queries are answered by resolving name servers. Conversely, the shorter the TTL the faster any changes you make to your DNS will propagate in servers that have cached data. However, your domain will receive more query traffic.
Records that are static and don’t change often should have TTL’s set between 1800 (being on the low end) to 86400 seconds (30 minutes to 1 day cache).
Records configured with Failover or that change often should have TTL’s set anywhere from 180 to 600 (3 to 10 minutes cache).
If a change is needed for a record with a high TTL, then the TTL can be lowered prior to making the change and then raised back up again after the changes were made.
|C) Record Mode||The Record Mode is how you enable settings like Failover, Record Pools, or Round Robin with Failover. You can read more about these settings here.|
|D) IP||The IPv4 address of your FQDN. An IP (Internet Protocol) address consists of a four octet 32-bit address.|
|E) Notes||Add a helpful note with keywords so you can search for your records later.|
|F) Save||Save your record changes and don’t forget to commit your changes after you’re done making record changes for this domain!|
Video Tutorial: How to Add, Edit, and Delete Records
ADD AN A RECORD
4. In this screen, you will add the record information. Follow the steps below:
A) Name: This will be the hostname for your record. It is important to note, the domain name is automatically appended to the “Name” field of the record.
B) TTL: Edit the TTL. Time to Live is measured in seconds and is the amount of time the record will cache in resolving name servers and web browsers.
C) Record Mode: The Record Mode will be left at Standard for this tutorial. Please note, the other Record Mode options are covered in different tutorials.
D) IP Address: The IPv4 address of your FQDN. An IP (Internet Protocol) address consists of a four octet 32-bit address.
E) Note: Add a helpful note with keywords so you can search for your records later.
F) Save and Close: Save your changes. Don’t forget to commit your changes.
Information on the NX Domain feature can be found in the Disabling a Record tutorial.
EDIT AN A RECORD
3. Under the A Records section, select a record by clicking the check mark next to it, then click the icon to edit a record.
Please note, you can not edit a record that has not been committed following its creation.
DELETE AN A RECORD
3. Under the A Records section select a record by clicking the check mark next to it, click the icon to delete a record.
Please note, you can not delete a record that has not been committed following its creation.
4. The record will now show as strike through text, and is now in the queue of changes to be committed.