Tip: Have your most recent Google Voice billing statement ready - you'll need information from it. You will also need admin accesss to Google Workspace. Contact your IT administratior if you do not have access.
What you'll need
Account ID
16-digit billing account ID (remove the dashes)
PIN
10 digits
Account Info
Name and address (from Google Voice Locations)
Step-by-step process
Step 1. Get Account ID
Go to Google Admin -> Billing -> Payment Accounts -> Account ID.
Find the account linked to Google Voice (16 digits) and remove the dashes before entering it.
Step 2. Get PIN
Go to Google Admin -> Apps -> Google Workspace -> Google Voice -> Number porting -> Port-out info.
Click Preview if needed to reveal the PIN.
Step 3. Get Billing Address
Go to Google Admin -> Apps -> Google Workspace -> Google Voice -> Locations.
Use the address associated with your Google Voice service.
Make sure you provide this information to us EXACTLY as it appears in order to prevent rejections.
Step 4. Submit Port In Request
Once you have gathered all of this information, submit your port in request and we'll get working on it.
Things to keep in mind
Be sure to keep your Google Voice account active until the entire porting process is complete.
For more information, see Google's help page here: https://knowledge.workspace.google.com/admin/voice/port-out-voice-numbers.