Number Porting: Keeping Your Number When You Change Supplier

You keep your number. It is the fear that stops more businesses changing supplier than price ever has, and it has been unfounded for years — numbers move with you, not with the provider.

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The number is yours, not your supplier’s

A phone number is not the property of the company that currently bills you for it. Porting moves it to a new provider while the number itself stays exactly the same, which means the signage, the vehicles, the business cards, the website and every listing you have ever appeared in remain correct. Nothing printed becomes wrong. This is the single most common reason businesses stay somewhere they are unhappy, and it is based on something that has not been true for a very long time.

What actually takes the time is paperwork rather than technology. The details on the port request have to match what the losing provider holds — the exact business name, the address as they have it, the account number — and a mismatch is the usual cause of a rejection. That is why a port that should take days sometimes takes weeks: not because moving the number is difficult, but because somebody typed the trading name rather than the registered one.

The other thing worth knowing is what porting does not cover. A number tied into a package with broadband may have contractual consequences even though the port itself is straightforward, and non-geographic numbers, some VoIP-only numbers and numbers on certain legacy platforms have their own rules. None of that is a reason not to move; it is a reason to establish the position before serving notice rather than after.

How it actually goes

List every number

Including any billed separately. Numbers missed from the list are the most common porting surprise.

Match the details exactly

Registered name, address and account number as the losing provider holds them, not as you would write them.

Agree a date

You choose it. A quiet morning rather than mid-week at eleven, which is when most businesses are busiest.

The cutover

Minutes rather than hours. Calls can divert to mobiles across it where you cannot afford any gap at all.

The number is unchanged

Signage, vehicles, stationery, website and every listing stay correct. Nothing printed has to be reprinted.

Cease the old service

So you stop being billed twice. Being charged by two suppliers after a move is common and avoidable.

Who we work with

We are independent of any single network or vendor, so the recommendation follows the requirement.

Telephony platforms

Hosted, on-premise or Microsoft Teams — the right answer depends on the building, not on what we prefer to sell.

Network and vendor names and logos are the trademarks of their respective owners, shown to describe the services SCG Solutions supplies.

What actually goes wrong

Details on the request not matching the losing provider’s records — the usual cause of rejection
A number billed separately and therefore left off the list entirely
Notice not served, so the port succeeds and the old contract runs on regardless
The old service left active, so two suppliers bill for months
A number bundled with broadband, where moving one has consequences for the other
Scheduling the cutover for a busy period rather than a quiet one

Number Porting: Keeping Your Number When You Change Supplier — Common Questions

Will we definitely keep our number?

Yes, in all normal circumstances. The number is not the property of the supplier billing you for it and porting moves it unchanged. Some non-geographic numbers and certain legacy platforms have their own rules, so it is worth confirming for your specific numbers — but the default answer for a standard business line is that it moves with you.

How long does porting take?

For a simple single line, commonly around ten working days once the paperwork is correct. For a larger estate, several weeks — mostly checking and scheduling rather than work. The variable is almost always whether the details on the request match what the losing provider holds, not the technical process.

Why do ports get rejected?

Nearly always a details mismatch: the trading name rather than the registered name, an old address, or a wrong account number. It is administrative rather than technical, and it is why a good supplier checks against your bill rather than asking you to recall the details. Each rejection costs days.

Will we be without phones during the switch?

Minutes at most, on a morning you choose. Where a business genuinely cannot afford any gap — a booking line, a support desk — calls divert to mobiles across the cutover so nothing is missed. The mistake worth avoiding is scheduling it for your busiest hour, which happens more often than it should.

Do we need to tell customers our number is changing?

No, because it is not. That is the point of porting, and it is why nothing on your signage, vehicles, stationery, website or directory listings needs updating. If a supplier tells you a new number is required, that is a reason to ask why rather than to accept it.

Can we port some numbers and not others?

Yes, though it needs planning. Partial ports are common where a business is consolidating or closing a site, but leaving numbers behind means keeping an account open somewhere. Usually the cleaner answer is to move everything and cease the old service properly, so you are not paying two suppliers indefinitely.

Worried about losing your number?

You will not, and it is worth ten minutes to hear why rather than staying somewhere on the strength of it. Tell us what numbers you have and who bills them, and we will tell you exactly what moving them involves — including the contractual position, which is usually the part that actually matters.

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