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Porting UK numbers into Invoca requires a signed Customer Letter of Authority and a porting spreadsheet, and typically takes two to four weeks.
Porting phone numbers into Invoca from the UK involves a few steps. This guide covers the required documents and key timelines.

Step 1: Prepare the required documents

Customer Letter of Authority (CLoA): confirms your current provider has your consent to release your numbers to Invoca. Reach out to your account team or support@invoca.com for the UK CLoA form. It needs to include:
  • Details of current and new providers: names, addresses, and a contact email for both.
  • Numbers to be ported: both Geographic (Geo) and Non-Geographic (Non-Geo) numbers. For Geo numbers, include the Main Billing Number (MBN) if known. Use continuation sheets for additional numbers and sites.
  • Your company’s details: company name as shown on your most recent bill, billing address (town/city, county, postcode), and your company registration and billing account numbers.
  • Authorization statement: confirming you authorize Invoca to act on your behalf, and that your current provider can disclose the necessary details to complete the port.
  • Requester’s information: signed consent from an authorized representative, with name, job title, email, and date. A CLoA is valid for 30 days from the date it’s signed.
Porting template spreadsheet: list every phone number to be ported, including:
  • Required: Number to Port, Campaign URL
  • Optional: Description, Media Type, Detected Destination, and any other marketing data to apply

Step 2: Submit a support ticket

  1. Reach out to your account team or support@invoca.com to create a new ticket with the subject and description “Request to port-in phone numbers,” Case Reason “Number Management,” and Sub-Category “Porting Numbers.”
  2. Attach your completed CLoA, your porting spreadsheet, and your phone bill if applicable.
  3. Submit the ticket once everything is attached.

Step 3: Await confirmation and updates

Once submitted, Invoca validates your information and coordinates with your current carrier, with regular updates along the way. Estimated timeline: typically two to four weeks, depending on the carrier. You’ll be notified when the port is scheduled and completed. Important notes:
  • Make sure all information matches your billing records exactly to avoid delays.
  • The CLoA is valid for 30 days from its signing date.
Common reasons for rejection:
  • Billing address mismatch
  • Customer/business name mismatch
  • Authorized name and signature mismatch
  • Account with the losing carrier on hold due to non-payment
  • Numbers on a bundle account that the carrier won’t allow to port out individually
  • A PIN is required for number release
A corrected request is resubmitted as a new order, which increases the total time to port.

Where to go next

Last modified on September 23, 2026