This article provides information on modifying a registration in the Antenna Structure Registration (ASR) system. You would modify a registration to change technical data about the structure. For example, increasing the height of the structure, changing the obstruction marking/lighting, correcting the coordinates or the FAA Study Number are all things that are filed on a modification application. A request to modify a registration may require Environmental Notice .
Changes to administrative information on your registration such as mailing address, phone number, or e-mail address are handled by filing an Administrative Update .
Steps to Filing a Request to Modify a Registration in ASR
- Log in to ASR Online Filing  with your FCC Registration Number (FRN) and password.
- Click Manage Your ASR Numbers.
- Select the purpose MD - Modification of a Antenna Structure Registration and click on the Continue button.
- Click the registration number you would like to update and click the Continue button at the bottom of the screen.
- Click Save and Continue to navigate through the application.
- Sign your application and click Submit Application.
Note: If your application requires environmental notice, you will need to sign and submit the application both when you complete Part I prior to environmental notice and again when you return to the application to complete Part 2.
FAQs – Filing a Request to Modify a Registration in ASR
Will I owe a filing fee?
Why can’t a see the registrations I want to update in step 4?
There are a few possibilities:
- Registrations must be in a Constructed status in order to file a modification. This policy is in place to promote air safety. If you need to modify a tower prior to it being constructed, you will need to cancel  the existing tower registration and file a new  tower registration.
- The registration must be linked to the same FRN you used to log in to ASR Online Filing.
- If you previously started to file a modification application and did not complete the filing, it could be in a list of Unsubmitted Applications.
How do I know if my application is received at the FCC?
Applications will appear immediately in ASR Application Search . Enter the file number in the ASR Application Search to find your application.
Last Updated: 06/21/2012