Can You Keep Your Business Phone Number When Switching To VoIP
Let’s be honest. The biggest fear when moving to VoIP is losing your business number.
That number is everywhere. Your website. Your vans. Google. Email signatures. It is your brand.
Here is the good news. Yes, you can keep it. In the UK, you have the legal right to move your number to a new provider. It is called number porting.
So if you are switching to hosted VoIP phone systems, cloud PBX solutions, or SIP trunking services, your number can come with you. Simple as that.
What Is Number Porting And Why It Matters
Number porting means moving your phone number from your old provider to your new one.
You are not changing your identity. You are just upgrading the system behind it. That is the vibe.
With the PSTN switch off coming by January 2027, old copper phone lines are being removed across the UK. If you are still using ISDN or PSTN, you will need a digital system like business telephony UK solutions.
Porting your number is part of that move. And your customers will not see any change. Because there is none.
How To Keep Business Phone Number VoIP Step By Step
Alright. Let’s break this down properly. It sounds complex. It is not.
Most of the process is handled by your new provider. You just need to give the right details.
Step One Verify Your Details
Your new provider will ask for your business name, service address, account number, and billing number.
These must match your current provider exactly. Even small differences can cause delays. Low key annoying, but easy to avoid.
Step Two Sign A Letter Of Authorisation
This is a simple form. It gives your new provider permission to move your numbers.
You usually attach a recent bill. Then the port request is submitted.
Step Three Wait For Confirmation
Most UK ports take 7 to 14 working days. Some are faster. Larger or multi site setups can take longer.
During this time, your new cloud communications setup can be built. That includes voicemail, call recording, auto attendants, and CRM links. Everything ready to go.
Step Four Go Live
On the agreed date, your number switches to VoIP.
Downtime is usually just a few minutes. Then you are live on your new system. Same number. Better tech. Let’s go.
What Types Of Numbers Can Be Ported
Most UK business numbers can be moved. For example:
- Geographic numbers
- Non geographic numbers
- Existing landlines
- Mobile business numbers
- DDI ranges
- Multi site numbers
- ISDN blocks
There are rare exceptions. But for most businesses, porting works fine.
If you are unsure, a trusted IT support for businesses team can check before you begin.
Microsoft Teams Phone And Keeping Your Number
Using or planning to use Microsoft Teams phone integration? Good choice.
You can port your existing numbers into Teams. This can be done through Microsoft Calling Plans or Direct Routing using SIP trunking.
Direct Routing often gives more flexibility and better value for growing UK businesses. Especially if you want control and room to scale.
So yes, your Teams setup can keep your business identity. No cap.
Why Keeping Your Business Number Matters
Changing your number creates chaos. You would need to update your website, Google profile, social media, adverts, printed material, and directories.
That takes time and money.
It also affects:
- Customer trust
- Inbound leads
- Marketing consistency
- CRM data accuracy
- Call tracking reports
- Brand recognition
- Sales momentum
Even missing one call a day can mean lost revenue over a month. That is real impact.
Keeping your number protects your marketing, your ecommerce campaigns, and your CRM tracking. That is smart business.
PSTN Switch Off Why You Cannot Ignore It
The PSTN switch off is happening. By January 2027, traditional landlines will be retired in the UK.
If you do nothing, your old phone lines will stop working.
Moving to hosted VoIP or cloud PBX is no longer optional. It is essential.
The smart move is to plan early. Do not wait for the last minute rush.
We explained this in detail in our PSTN switch off preparation guide. It shows how to avoid stress and stay ahead.
Why Managed Porting With Cleartwo Makes Sense
Could you manage number porting yourself? Yes.
Should you? Probably not.
When you work with Cleartwo, you get more than a phone system. You get full support and a clear migration plan.
We handle the paperwork. We check the details. We speak to your old provider. We test everything before go live.
Our VoIP solutions come with 99.99 percent uptime agreements, advanced call recording, CRM links, smart automation features, and strong IT security for SMEs. All at fair pricing.
If you want to see how this connects with CRM and web systems, check our guide on integrating VoIP with cloud CRM platforms. It shows how keeping your number fits into a bigger digital plan.
How Long Does It Take To Keep Business Phone Number VoIP
Most standard number ports take 7 to 14 working days.
Larger or multi site setups may take longer. If your broadband is linked to your landline, planning is even more important.
With a managed provider like Cleartwo, timelines are clear and realistic. No overpromises. Just proper coordination.
Frequently Asked Questions
Can I Keep My Business Phone Number When Switching To VoIP In The UK
Yes. UK rules give you the right to port your number to a hosted VoIP or cloud PBX provider. Most business numbers can be transferred without issues.
Will There Be Downtime During Number Porting
Downtime is usually minimal. Often just a few minutes on the agreed date. Your new system is normally ready before the switch.
How Much Does It Cost To Port A Business Phone Number
Under Ofcom rules, providers cannot charge you directly for porting. Many VoIP providers include it in the setup process. Always confirm this first.
Can I Port My Number To Microsoft Teams Phone
Yes. You can port your number into Microsoft Teams using Calling Plans or Direct Routing with SIP trunking. Direct Routing often offers more flexibility for UK businesses.
What Happens If I Do Nothing Before The PSTN Switch Off
If you stay on PSTN or ISDN after 2027, your traditional landline services will stop working.
Moving to VoIP and porting your number protects your business communications.
So here it is.
You can keep your business phone number when switching to VoIP. It is secure. It is regulated. It is straightforward when managed properly.
The real question is not can you keep your number.
The real question is why wait?
Let’s upgrade your business telephony UK setup. Let’s future proof your communications. You have got this.
Author: Zak
