This guide outlines the supported number types, required documents, hosting rules, and porting timelines for UK numbers.
Initial Overview
1. Supported Number Types
Number Type | Example Prefixes |
Geographic (Local) Numbers | +441, +442 |
Mobile Numbers | +447 |
Non-Geographic (National) | +443 |
Non-Geographic (Toll-Free) | +44800, +44808
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2. Submit Your Request
Request porting directly in the CloudTalk Dashboard: open Numbers > Port existing number and follow the guided steps. All supported number types for this country use the same flow, and you can track your request anytime under Numbers > Porting requests.
Looking to port numbers from other countries? See Global Porting Coverage.
3. Letter of Authorization
Where an LOA is required, the correct template for this country downloads inside the Documents step of your porting request: download it, sign it, and upload it right there. You no longer need a separate template from this guide.
(Other document requirements listed below.)
4. Timelines & Pricing
Number Type | Estimated Duration | Pricing |
Local | ~15–20 business days | €30.00 per request, €7.00 per number |
National | ~15–20 business days | €30.00 per request, €7.00 per number |
Toll-Free | ~15–20 business days | €30.00 per request, €8.00 per number |
Mobile | ~5–7 business days | €30.00 per request, €7.00 per number |
⚠️ Timelines may vary if submitted details do not match your current provider’s records.
Required Documents for Number Porting
The correct LOA template downloads inside the Documents step of your porting request.
✅ Geographic (Local) Numbers
Signed Letter of Authorization (LOA)
Recent billing document (issued within the last 3 months, showing number and account holder)
UK site address matching the number’s registered location
✅ Mobile Numbers
Signed LOA
PAC Code (Porting Authorization Code)
9-digit Format: 3 letters + 6 digits (e.g. ABC123456) - Issued by your current mobile provider
Expiration date of PAC Code with current Provider - Valid for 30 days by default
From major carriers like Vodafone or O2 there will be one unique PAC code per number
If you are moving from another VoIP platform there may be only one PAC code for a whole batch of numbers
You’ll enter your PAC code in the Verification step of your porting request.
Recent billing document (issued within the last 3 months, showing number and account holder)
✅ National & Toll-Free Numbers (Non-Geographic)
Signed LOA (must include Billing Account Number)
Recent billing document (issued within the last 3 months, showing number and account holder)
Regulatory Compliance (KYC)
UK number porting is subject to identity verification under UK telecom regulations. CloudTalk (via our partner carrier) may request additional documents depending on:
Whether your company is UK-based or international
The type of number being ported (mobile, geographic, non-geographic, etc.)
Porting Process Overview
Submit Your Porting Request
Submit your request in the CloudTalk Dashboard under Numbers > Port existing number.
Initial Review
Cloudtalk team'll verify number portability and confirm the next steps.
Documentation Collection
Complete and sign the LOA (Letter of Authorization), and provide a recent invoice from your current telecom provider.
Submission to Carrier
CloudTalk submits your request to our partner carrier, who then forwards it to your current provider.
Approval or Rejection
If approved, Cloudtalk team will confirm the porting date (typically 2–4 business days in advance).
If rejected, Cloudtalk team will share the reason and guide you on how to correct and resubmit the request.
Common Rejection Reasons
Issue | Description | How to Fix |
Mismatched Account Information | Details on the LOA don't match what's on file with the losing provider (often the postal code). | Double-check the LOA fields against your provider’s account info. |
Incorrect or Incomplete LOA | Required fields are missing or the signature is typed. | Fill all fields and apply a valid digital or handwritten signature. |
Invalid PAC or STAC | The code for mobile numbers is incorrect or expired. | Request a valid PAC/STAC from your current provider before submission. |
Outdated Billing Document | Invoice is older than 3 months. | Submit a recent invoice issued within the past 90 days. |
On Porting Day
The number is activated in your CloudTalk account
Your former provider deactivates the number
CloudTalk billing begins the same day
We recommend notifying your previous provider to prevent duplicate charges
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:
Questions about a request you've already submitted? Open it under Numbers > Porting requests and click Open conversation.