What Is Number Porting?
Number porting is the process of moving your existing phone number from one provider to another while keeping the number itself unchanged. In South Africa, ICASA introduced number portability back in 2005 as a consumer-protection measure, precisely so that businesses and individuals aren’t held hostage by a provider just because they own the number. It’s the reason you can switch to a better, cheaper or more modern phone system without changing the number on your van, your business cards, your Google listing — or in your customers’ contacts.
Why number porting matters
Your business phone number is one of your most valuable assets. It’s printed everywhere, indexed by Google, and sitting in thousands of customers’ phones. Losing it would be a marketing disaster. Number porting eliminates that risk entirely — you can change providers and keep the same number, so customers reach you exactly as before.
How it works in South Africa
The new (gaining) provider drives the process. You sign a letter of authority and supply documents proving you’re the account holder; the new and old providers coordinate the technical switch; on the agreed date your number moves across, usually within a short window. To customers, nothing changes.
What you need to port
- A letter of authority authorising the port (your new provider supplies the template).
- Your latest account/service agreement or invoice from the current provider.
- The exact number(s) to port, matching the account details on file.
- Proof of identity / business registration in some cases.
The most common cause of delays is a mismatch between your submitted details and what your old provider has on record — make sure names, account numbers and addresses match exactly. (See How to Port Your Business Phone Number to VoIP in South Africa for the step-by-step.)
How long it takes
Porting in South Africa typically takes 5 to 10 business days from submission. It’s usually free, though some providers charge a small fee (in the region of R250–R500 per number). Your old line keeps working until the cut-over, so you stay reachable throughout.
Avoiding downtime
Two simple rules:
- Build and test your new system before the port. Your cloud PBX is fully configured on a temporary number while the port is in progress, so the actual cut-over is near-instant.
- Don’t cancel your old line until the port is confirmed complete. Cancelling first can release the number and complicate the port.
What can and can’t be ported
Most South African geographic numbers (011, 012, 021, 031, etc.) and many other ranges can be ported. Your provider will confirm your specific number during sign-up. Some specialised numbers may have restrictions — check before you commit.
Frequently asked questions
Will my phone stop working during porting?
No. Your old line keeps working until the cut-over, and a well-planned port switches over with minimal or no downtime.
How much does it cost?
Usually free; some providers charge R250–R500 per number. Confirm with your new provider before signing.
Can I port multiple numbers at once?
Yes — businesses routinely port a whole range of numbers in a single request.
Will customers notice anything?
No — they keep calling the same number and it works as before.
Keep your number when you switch
NexysCloud manages the entire porting process for you, including paperwork and a clean cut-over with no lost calls.
Book a consultation or call 010 110 7100.
