A domain Auth Code is a code used when transferring many domain names from one registrar to another.
You may also see it called an EPP code, AuthInfo code, authorisation code or transfer code. The name varies, but the purpose is broadly the same: it helps prove that the transfer has been authorised by the domain holder.
When do you need an Auth Code?
You usually need an Auth Code when moving a domain between registrars.
For common extensions such as .com, .net and many others, the code is part of the transfer process. Without it, the gaining registrar cannot normally start or complete the transfer.
Some domain extensions use different transfer processes, so always check the specific rules for your domain.
Where do you get the code?
In many cases, you can request the Auth Code from your current registrar’s control panel.
If it is not available there, you may need to contact the registrar directly. The code is often sent to the registered contact email address, so it is important that your domain contact details are up to date before starting a transfer.
If you cannot access the email address on the domain, the transfer may be delayed.
Keep it private
Treat an Auth Code like a password for the transfer process.
Do not post it publicly, send it to the wrong company or leave it in shared documents. Only provide it to the registrar you are transferring the domain to and only when you are ready to move the domain.
Once the transfer is complete, the old code should no longer be useful, but it is still sensible to handle it carefully.
Check for transfer locks
Before a transfer can proceed, the domain lock may need to be removed.
If the domain has a transfer lock enabled, request the Auth Code and remove the lock as part of the same planned process. After the transfer completes, check the lock status with the new registrar.
Also be aware that some domains may be subject to transfer restrictions after recent registration, transfer or contact changes.
Plan before you transfer
Moving a domain can affect more than the registration account.
Before starting, check where DNS is managed, where email is hosted and whether any services depend on the current setup. A registrar transfer does not always change DNS, but it is best to know before you begin.
The Auth Code is only one part of the process. Clear planning helps prevent avoidable downtime or email disruption.