Porting your UK phone number to CloudTalk is a smooth process when the necessary documents and codes are provided correctly. This guide will walk you through everything you need to know for a successful port.
Supported Number Types
Geographic (local) numbers: (+441,+442)
Mobile numbers: (+447)
Non-geographic (national) numbers: (+443)
Non-geographic (toll-free) numbers: (+44808, +44800)
Required Documents
To initiate the porting process, please prepare the following:
Signed Letter of Authorization (LOA): Should be filled and signed by the account holder or authorized representative. Ensure the current provider is listed as the "Current Retailer," and include their email contact.
The site address must be within the United Kingdom. There will be a UK site address associated with each number. Even if your business is not based in the UK, your service provider will be able to tell you what the registered service address is.
Recent Billing Document: A bill from your current provider, dated within the last three months, ideally showing the number(s) to be ported and account holder details.
Non-geographic numbers: The billing account number must be listed on the LOA
Special Requirements
Mobile numbers: Require a PAC (Porting Authorization Code)
→ Format: three letters + six digits (e.g. ABC123456)
→ Provided by your current mobile provider via text, call, or online account
Geographic (local) numbers: Require a valid UK site address, which may differ from your billing address
Regulatory Compliance:
UK number porting is subject to identity verification (KYC) rules under UK telecom regulations. CloudTalk (via our partner carrier) may request specific documentation depending on your account type and the kind of number you're porting. See the table below for a breakdown of required documents:
Number Type | Business | Notes |
Local (Geographic) |
| Site address must match number’s registered location |
National (Non-Geo) |
| Address doesn’t need to match any physical location |
Mobile |
| PAC code is mandatory, valid for 30 days |
Toll-Free |
| Some losing providers may request additional verification |
Estimated Timelines
Local, National, and Toll-Free Numbers: Porting typically takes 15–20 business days from the date of submission.
Mobile Numbers: Porting usually completes within 5-7 business days after submission.
Step-by-Step Porting Process
Submit a porting request to CloudTalk's Porting Team
We confirm the timeline and required documents
You return the LOA, invoice, and PAC (if mobile)
CloudTalk submits the request to our partner carrier
Our Partner Carrier coordinates with your current provider's carrier
You’ll be notified of the confirmed porting date
On that date, the number activates in CloudTalk
Common Rejection Reasons (and How to Avoid Them)
Mismatched Account Information: Verify that the details on the LOA document match those with the losing service provider. The most common rejection is incorrect postal code.
Incorrect or Incomplete LOA: Ensure all fields are accurately filled, and the document is digitally signed. Names typed in the signature line will not be accepted by the operator.
Invalid PAC or STAC: (for mobile numbers) Confirm the code with your current provider before submission.
Outdated Billing Document: Provide a bill dated within the last three months.
On Porting Day
Your number becomes active on CloudTalk
Your old provider deactivates the number
CloudTalk billing begins the same day
We recommend confirming cancellation with your previous provider to avoid double billing
SMS Functionality Note
SMS for mobile numbers is activated along with voice
Geographic, national, and toll-free numbers are not SMS capable
Need Help?
For further assistance, please refer to: