Overview
Reverse DNS (rDNS) allows an IP address to be resolved back to a hostname via a PTR (Pointer) record. This is commonly used for email deliverability, server identification, security tools, and compliance requirements.
As your service provider, we manage the PTR records for IPv4 and IPv6 address blocks assigned to you. To have a PTR record created or updated, simply submit a request through the customer portal.
Who Can Request rDNS?
Any customer with an active account who has been assigned one or more of the following is eligible to request rDNS:
- A dedicated IPv4 address or IPv4 block
- A dedicated IPv6 address or IPv6 block
Note: rDNS can only be configured for IP addresses that are assigned to your account. We are unable to set PTR records for IPs not under your allocation.
What You'll Need
Before submitting your request, have the following information ready:
| Field | Description | Example |
|---|---|---|
| IP Address | The specific IPv4 or IPv6 address you want rDNS set for | 203.0.113.25 or 2001:db8::1 |
| PTR Value | The fully qualified domain name (FQDN) you want the IP to resolve to | mail.yourdomain.com |
Important: The hostname you provide (PTR value) should have a corresponding forward DNS A or AAAA record pointing back to the same IP address. While we can set the PTR record regardless, many systems (such as mail servers and security tools) will check that forward and reverse DNS match. A mismatch may cause deliverability or authentication issues.
How to Submit a Request
- Log in to the customer portal at your provider's portal URL.
- Navigate to Support → Open a Ticket (or click New Ticket).
- Select the department Support.
- In your ticket, include the following:
- The IP address (IPv4 or IPv6) requiring rDNS
- The PTR value (hostname) you want returned for that IP
- Whether this is a new record, an update to an existing record, or a removal
- Submit the ticket.
Example Ticket Requests
IPv4 Example:
Please set rDNS for the following:
203.0.113.25mail.yourdomain.com
IPv6 Example:
Please set rDNS for the following:
2001:db8::1server1.yourdomain.com
Multiple IPs:
If you need PTR records set for multiple addresses, you may include all of them in a single ticket. Please list each IP and its corresponding PTR value clearly.
Processing Time
PTR record updates are typically completed within 1 business day of your ticket being received. DNS propagation may take up to 24–48 hours to be visible globally after the record has been set.
Verifying Your rDNS
Once your request has been completed, you can verify the PTR record using the following commands:
Linux / macOS:
dig -x 203.0.113.25
or
host 203.0.113.25
Windows (Command Prompt):
nslookup 203.0.113.25
A successful response will return the hostname you requested as the PTR record value.
Frequently Asked Questions
Can I set rDNS for a shared IP address?
No. PTR records can only be configured for dedicated IP addresses assigned solely to your account.
Can I request rDNS for an entire IP block at once?
Yes. If you have a specific naming pattern for a range of IPs (e.g., ip-[last-octet].yourdomain.com), mention this in your ticket and we can accommodate bulk requests.
What if I need to remove or change an existing PTR record?
Simply open a new ticket and specify whether you'd like the record updated to a new value or removed entirely.
Does rDNS affect my forward DNS records?
No. Setting a PTR record does not automatically create or modify any forward A/AAAA records. You are responsible for managing your forward DNS through your domain registrar or DNS provider.
Need Help?
If you have questions about your IP allocation or are unsure which IPs are assigned to your account, please open a support ticket or contact our team at [email protected].
