We coordinate the transfer so calls route through your new system with minimal or zero downtime.
Number Porting Service: Keep Your Existing Business Phone Numbers When You Move to VoIP
Switching phone systems should not mean changing your phone numbers.
Stride’s Number Porting Service enables UK businesses to move their existing landline, mobile, and non-geographic numbers to a modern VoIP or cloud phone system without disruption, downtime, or lost calls.
Whether you are migrating from BT, Virgin Media, Gamma, TalkTalk, or another UK carrier, we manage the entire number porting process on your behalf — securely, compliantly, and with clear, predictable timelines.
2027 PSTN switch-off ready
Setup in 1-2 weeks
25 Years
UK Telecoms Expertise
1,000+
UK Businesses Connected
99.999%
Uptime SLA Guarantee
UK-Based
Personal Support
Number porting is the regulated process of transferring your existing business phone numbers from your current telecoms provider to Stride’s VoIP platform.
Whether you are migrating from BT, Virgin Media, Gamma, or TalkTalk, we manage the entire process on your behalf — securely, compliantly, and with clear timelines.
- Customer Continuity: Reachable on the same numbers.
- Brand Stability: No need to reprint stationery or marketing.
- Zero Interruption: No downtime for inbound or outbound calls.
What is Number Porting?
This ensures:
- Customers continue to reach you on the same phone numbers
- Your branding, stationery, and website remain unchanged
- No interruption to inbound or outbound calling
Stride’s managed porting process eliminates these risks, allowing you to modernise your communications infrastructure without changing how customers contact you.
This is especially critical for organisations preparing for the UK PSTN switch-off, where legacy analogue and ISDN lines must be migrated to IP-based services.
Key Benefits of Managed Porting
We manage the entire migration from BT, Virgin Media, Gamma, or TalkTalk, so you can focus on running your business.
Zero Disruption
Preserve Identity
Retain your existing 01, 02, 03, or 0800 numbers so customers always reach familiar contact points.
Admin Simplicity
We handle all technical and regulatory requirements, dealing directly with your losing provider (BT, Virgin, Gamma, etc.).
Location-Free
Once ported, your numbers are no longer tied to a physical line and can ring on mobile apps, desktop clients, or IP desk phones anywhere.
Core Features of Our Number Porting Solution
Comprehensive Coverage
01/02, 03, 0800/0808, mobile numbers, and full DDI ranges.
Expert Validation
Retain your existing 01, 02, 03, or 0800 numbers so customers always reach familiar contact points.
Scheduled Migration
We handle all technical and regulatory requirements, dealing directly with your losing provider (BT, Virgin, Gamma, etc.).
Resilient Routing
Once ported, your numbers are no longer tied to a physical line and can ring on mobile apps, desktop clients, or IP desk phones anywhere.
Why Choose Stride for Your Number Migration?
Unlike providers that treat porting as an afterthought, Stride considers number migration mission-critical.
We are UK-based porting specialists with in-depth knowledge of:
- UK postcode-based number allocations
- Ofcom porting regulations
- National carrier routing and interconnects
From single-site SMEs to multi-location enterprises, we provide a structured project-managed approach, covering:
- Cloud hosting
- Licensing and provisioning
- Number porting
- Ongoing UK-based technical support
Which Numbers Can Be Ported?
Stride supports porting for:
- Geographic numbers (01 / 02)
- UK-wide non-geographic numbers (03)
- Freephone numbers (0800 / 0808)
- Business mobile numbers
- Full DDI ranges (blocks of numbers)
If you are unsure about eligibility, we confirm this during your initial assessment.
Book You FREE assessment →
Number Porting & the UK PSTN Switch-Off
As the UK PSTN network is withdrawn, traditional analogue and ISDN phone lines will cease to function.
- Your existing numbers are preserved
- They continue operating over IP
- Your business remains compliant with future telecoms infrastructure
For most organisations, porting is a mandatory step when migrating to VoIP.
Our UK Number Porting Process
Stride follows a regulator-compliant, five-step structured process to ensure a smooth transition for your business.
- Step 1: Validation: We confirm eligibility, current provider details, and billing information to prevent rejections and delays.
- Step 2: Submission: Stride submits the full request, including the Letter of Authority (LOA), directly to your existing provider.
- Step 3: Confirmation: Once approved, we align the port with your VoIP installation and schedule it to avoid peak business hours.
- Step 4: Live Transfer: On the agreed date, numbers migrate to Stride's network. Most ports complete with zero downtime.
- Step 5: Testing: After completion, we verify all call flows, IVRs, and hunt groups with our UK-based support team.
What Our Customers Say About Number Porting on Google
Real results from UK businesses who made the switch
1000+ UK businesses trust Stride | 5/5 average rating | 98% first-contact resolution
FAQs - Common Concerns (and How We Handle Them)
Will my phones stop working?
No. Porting is coordinated with system setup to avoid service gaps.
Can I port numbers from BT, Virgin, or Gamma?
Yes. We regularly port numbers from all major UK carriers.
What if something goes wrong?
Stride manages escalations directly and can deploy contingency routing if required.
Can I port my numbers later?
Yes. You can start with temporary numbers and port existing ones later.
Is number porting legal for all UK business numbers?
Yes, Ofcom regulations mandate that providers must allow users to take their numbers with them when they switch services, provided the destination network can support it.
Does it cost money to port a number?
There is often a small administrative fee per number or range to cover the carrier processing costs. Stride provides a transparent quote for these costs during your initial audit.
Can I port an 0800 number?
Yes, Freephone and non-geographic numbers (03/08) are fully portable to the Stride cloud network.
What is an LOA in number porting?
A Letter of Authority (LOA) is a document signed by the business owner that gives Stride permission to act on your behalf to request the number transfer from your current provider.
Can I keep my 01494 High Wycombe number if I move to London?
Yes! Because VoIP is cloud-based, your “local” number is no longer tied to a physical exchange. You can keep your High Wycombe identity even if your physical office moves anywhere in the world.
How Long Does Number Porting Take?
Typical UK porting timeframes:
- Single numbers: 5–10 working days
- Number ranges / complex environments: 10–20 working days
- Mobile numbers: Varies by network
Stride provides clear timelines upfront and keeps you informed at every stage.
Keep Your Numbers, Upgrade Your System
Planning a move to VoIP or Microsoft Teams? Let Stride handle your number migration with expert care.
- Confirm number eligibility
- Understand realistic timelines
- Plan a zero-disruption migration
