Any number, any area code, anywhere in the UK.
Keep your existing numbers when you move. Add local numbers for any UK area code. Present different numbers for different departments. Full geographic number flexibility on a single SIP platform, managed by IP Four.
Any
UK area code available regardless of where your office is physically located
0
downtime when porting existing numbers to SIP trunking. Cutover managed outside business hours
48 hrs
typical provisioning time for new geographic numbers on the SIP platform
UK-wide
geographic number management across all UK area codes and number ranges
Complete control over your number estate.
Number Portability
Keep your existing geographic and non-geographic numbers when you move premises or change provider. Numbers are ported to the SIP platform with zero downtime. Your customers call the same numbers they always have.
Any UK Area Code
Add local numbers for any UK area code regardless of where your office is located. A London business can have a Manchester number. A Manchester business can have a Birmingham number. Presence in any UK market.
DDI Range Management
Full DDI range management for businesses that need individual numbers for staff, departments, or services. Allocate, reassign, and retire DDI numbers through a single management portal.
Multi-Number Presentation
Present different outbound numbers for different departments, campaigns, or locations. Your sales team presents a different number to your support team. Callers see the right number for the context of the call.
Non-Geographic Numbers
0800, 0845, 0870, and 03 numbers available and managed alongside your geographic numbers. All number types on a single SIP platform. Unified management, unified billing.
Number Routing Rules
Sophisticated routing rules applied per number. Route by time of day, day of week, caller location, or call volume. Each number behaves exactly as your business requires without complex PBX programming.
From number audit to full number flexibility.
Number Inventory Review
We audit all your current numbers across all sites and carriers. Identify which numbers are critical, which can be consolidated, and which new numbers would add value to your business.
Porting Strategy
Plan the porting of existing numbers to the SIP platform. Identify any numbers that cannot be ported and agree alternatives. Porting timelines agreed with your current carriers.
New Number Provisioning
Any new geographic or non-geographic numbers provisioned on the SIP platform. Numbers tested before porting of existing numbers begins.
DDI Configuration
DDI ranges configured and allocated to the correct users, departments, or services. Routing rules applied per number. All configuration tested before go-live.
Porting and Cutover
Existing numbers ported with zero downtime. Cutover scheduled outside business hours. All numbers tested on the new platform before old carrier connections are terminated.
Ongoing Number Management
Number management portal available for self-service changes. IP Four handles complex porting, new number provisioning, and routing changes. Your number estate managed as your business evolves.
Number flexibility delivered across the UK.
Challenge: A London professional services firm was relocating their office and was concerned about losing their well-established 020 number that clients had been using for 12 years.
Outcome: Existing 020 number ported to SIP platform before the office move. Number remained active throughout the transition. Clients experienced zero disruption. New office connected to the same number within 24 hours of moving in.
Challenge: A Birmingham-based national retailer wanted local phone numbers in 8 UK cities to improve response rates from local customers who preferred calling a local number.
Outcome: Local numbers provisioned for all 8 target cities within 48 hours. All numbers routed to the central contact centre. Inbound call volumes from target cities increased by 35% within 3 months.
Challenge: A Leeds recruitment agency needed different numbers for their permanent, contract, and executive search divisions so candidates and clients could reach the right team directly.
Outcome: Separate DDI ranges allocated to each division. Outbound number presentation configured per division. Candidate and client satisfaction improved. Call routing errors eliminated entirely.
Take control of your number estate today.
We will audit your current numbers and design a flexible number management strategy on SIP trunking. Keep what you have, add what you need, and manage everything from one place. Free assessment, no obligation.