Multifactor Authentication FAQ

Can I enable MFA for an account that’s shared between multiple users?

ARIN Online accounts are intended to be used by individual users. With MFA enabled on your ARIN Online account, sharing an account is not possible. Each user must create their own account in ARIN Online.

Each user account can be linked to a Role Point of Contact to gain access to the Organization Identifier (Org ID), and your organization’s resources while maintaining secure login credentials. More detailed step-by-step instructions for creating accounts and linking to Points of Contact can be found here.

Can I change my selected MFA method?

Yes, you can. You can easily do so in your ARIN Online account by navigating to the Settings page and selecting ‘Actions’ under Security Info, and then selecting ‘Manage Two-Factor Authentication.’

This will allow you to change your selected MFA method.

Can I register more than one security key on my account?

Not at this time. Accounts are limited to a single method of authentication which includes registering only one security key. ARIN is exploring the possibility of changing this in the future to allow more than one.

What happens if I lose access to my active authentication method?

If you have lost access to your authenticator app, phone number, or hardware key, it is still possible to access your account.

If you do have a usable MFA Recovery Code:

1. Enter your user name and password as normal.
2. Select Trouble with two-factor authentication? at the bottom of the ARIN Online log in screen.

3. A third field will appear on the log in screen for one of your MFA Recovery Codes.
4. Enter the MFA Recovery Code and select Sign In.

If you do not have a usable MFA Recovery Code:

1. Call ARIN Registration Services at +1 703-227-0660, Monday - Friday, 7:00 AM - 7:00 PM.
2. Provide the answers to your account security questions.

Why am I not receiving my MFA SMS passcodes?

Some countries cannot support SMS MFA, detailed here. If you are unable to use SMS multifactor authentication, you will need to utilize an authenticator app or a security key in order to enable multifactor authentication on your ARIN Online Account.

If you consistently are not receiving our SMS messages, despite living in a country that we list supporting SMS MFA, it is possible that your service provider does not support delivery of these SMS messages. 

We apologize for the inconvenience. You can use an authenticator app or security key to avoid this issue.