Domain Authorization Code Reference

This article serves as a reference for the formal structure, requirements, and key technical details of domain authorization codes.

Authorization code overview

An authorization code (also called auth code, EPP code, transfer code, or auth info) is a unique code required to authorize the transfer of a domain name from one registrar to another. The use of an authorization code is a common procedure for most TLDs, including all generic top-level domains (gTLDs) such as .COM, .NET, and .ORG.

Authorization code terminology

Authorization codes are known by several names, all referring to the same code:

• Authorization code: The formal ICANN term, and the term DNSimple uses
• Auth code: A shortened form of authorization code. The DNSimple interface uses it on buttons such as Send Auth Code
• EPP code: Extended Provisioning Protocol code, the technical protocol term. Many registrars and registries use it
• Transfer code: A common everyday name
• Auth info: An alternative term used by some registrars

Authorization code format

Character composition: Authorization codes typically consist of alphanumeric characters (letters and numbers). The exact format and length vary by registrar and TLD.

Length: Authorization codes are typically between 6 and 32 characters long, though the exact length depends on the registrar and TLD.

Case sensitivity: Authorization codes are usually case-sensitive. You must enter the code exactly as provided, including any uppercase or lowercase letters.

Special characters: Some authorization codes may include hyphens or other special characters. Enter the code exactly as provided, including any special characters.

When authorization codes are required

Most gTLDs: Authorization codes are required for all generic top-level domains (gTLDs), including .COM, .NET, .ORG, .INFO, and many others.

Some ccTLDs: Many country-code top-level domains (ccTLDs) also require authorization codes, though some have different transfer procedures.

TLD-specific exceptions: Some TLDs, such as .UK, have different transfer procedures that do not require an authorization code. For TLD-specific information, check the list of TLDs supported by DNSimple or contact support.

Obtaining an authorization code

When transferring a domain to DNSimple

To obtain an authorization code from your current registrar:

1. Log in to your account at your current registrar
2. Navigate to your domain management page
3. Unlock your domain (if it is locked)
4. Request the authorization code
5. The code will typically be sent to the registrant email address via email

The exact process varies by registrar. Some registrars provide the code immediately in the domain management interface, while others send it via email.

When transferring a domain away from DNSimple

To obtain an authorization code from DNSimple:

1. Log in to your DNSimple account
2. Navigate to the domain you want to transfer
3. Click Transfer Out in the registration section
4. The domain will be unlocked and the authorization code will be sent to the registrant email address within 6 hours

For step-by-step instructions, see Transfer a Domain Away from DNSimple.

Authorization code delivery

Email delivery: Authorization codes are typically sent via email to the registrant email address on file for the domain. The email may come from the registrar directly or from a third-party service provider.

Delivery time: At DNSimple, authorization codes are sent within 6 hours of requesting them. Do not click the request button more than once, as this slows down the delivery process.

Email addresses: Authorization codes are sent from addresses such as:

• donotreply@name-services.com
• support@dnsimple.com
• Other registrar-specific addresses

Spam folder: If you do not receive the authorization code, check your spam folder. Consider adding these email addresses to your trusted contacts to ensure optimal delivery.

Authorization code security

Confidentiality: Authorization codes are sensitive and should be kept confidential. Only share the authorization code with the registrar where you are transferring the domain.

Validity period: Authorization codes typically remain valid for a limited time, though the exact validity period varies by registrar and TLD. If a code expires, you can request a new one.

One-time use: Some authorization codes may be single-use only. If a transfer fails, you may need to request a new code.

Resending codes: If you requested an authorization code and have not received it within the expected time frame, you can request it again. However, avoid requesting it multiple times in quick succession, as this may delay delivery.

Using an authorization code

During transfer initiation: When initiating a domain transfer, you will be prompted to enter the authorization code. Enter the code exactly as provided, including any uppercase or lowercase letters and special characters.

Code validation: The gaining registrar will validate the authorization code with the losing registrar before proceeding with the transfer. If the code is incorrect or invalid, the transfer will be rejected.

Transfer approval: After entering the authorization code, you may need to approve the transfer request via email. The transfer cannot proceed without approval.

Troubleshooting authorization codes

Code not received: If you have not received an authorization code within the expected time frame:

1. Check your spam folder
2. Verify the registrant email address is correct and accessible
3. Wait the full expected time (6 hours for DNSimple)
4. Request the code again if necessary
5. Contact support if the issue persists

Invalid code: If an authorization code is rejected as invalid:

1. Verify you entered the code correctly, including case sensitivity
2. Check if the code has expired
3. Request a new code if necessary
4. Contact support for assistance

Code expired: If an authorization code has expired, request a new one from the losing registrar. The process for requesting a new code is the same as requesting the original code.

TLD-specific considerations

Special procedures: Some TLDs have different transfer procedures that do not require an authorization code. For example, .UK domains use a different transfer process.

Regulated TLDs: Some regulated TLDs may have additional requirements or restrictions related to authorization codes. For more information, see Regulated and Highly-Regulated Top-Level Domains.

Have more questions?

If you have additional questions or need any assistance with authorization codes, just contact support, and we will be happy to help.