How to complete the Dropbox Fax porting LOA

Updated Sep 29, 2025

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If you received the Dropbox Fax Letter of Authorization to fill out in order to port your number, and have questions about what information goes where, please use this guide to help.

Company (or Individual) Name: This is the name (company or individual) that your account is under with your current carrier.

Address: Please enter the service address that is referenced on your bill.

Current Service Providers: This is your current carrier who you pay for your number now.

Current Account Number: This is the account number associated with the fax number.

Type of Traffic: Fax

Telephone Number Begin: Please list your 10-digit fax number here. If you're porting more than one number, hit enter to fill in the space beneath.

Provide BTN (billing telephone number): This is your contact phone number associated with your account.

Port Date Requested: You can enter today's date or ASAP. If there is a deadline, please specify in your email to support.

Print your name, add your signature, and click "I agree" and the LOA will automatically be sent to support and a copy will be sent to your email.

Learn more about how the porting process works.

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