What is a Universal International Freephone Number (UIFN)?

A Universal International Freephone Number (UIFN) is a single toll free number that works across multiple countries, providing businesses with a global reach and enabling seamless customer communications around the world. As an integral part of the Universal International Freephone Service initiative, UIFN numbers eliminate the need for region-specific, toll free numbers, offering a cost-free connection for customers. This centralized solution improves customer satisfaction and supports a unified brand presence across international markets.

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Optimize your business operations with international toll free numbers

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Global Accessibility

Use a single, international toll free number to let customers worldwide reach your business easily.

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Cost Efficiency

Eliminate the need to manage multiple toll free numbers by switching to a single UIFN and reducing operational expenses. 

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Customer Experience

Provide free-of-charge calls for customers using international toll free phone numbers to build trust and satisfaction across global markets.

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Regulatory Compliance

Ensure compliance and reliability globally with these ITU-backed international phone numbers.

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Brand Consistency

Strengthen your brand image with a unified, professional presence using Universal International Freephone Numbers.

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Centralized Support

Simplify operations and enhance services with worldwide toll free numbers, offering cohesive and efficient customer support.

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Scalability

Enable seamless business growth and market expansion by easily adding UIFNs as and when required.

Unlock more benefits with DIDWW as your UIFN provider

At DIDWW, we go beyond expectations to deliver a comprehensive solution for your Universal International Freephone Numbers. We provide businesses with a consistent, professional presence across multiple countries, enhancing customer trust and delivering a superior user experience.

  • Extensive reachability

    A single UIFN is reachable from 60 countries, with coverage being continually expanded.

  • Cost saving

    Highly cost-efficient Toll Free solution for international businesses.

  • Quick setup and easy management

    Effortless and swift number acquisition and service management.

  • Premium call quality

    Universal International Freephone Numbers combined with premium service quality and reliability, and full regulatory compliance.

  • Seamless porting

    Wide Porting coverage for a smooth migration of your phone numbers to DIDWW.

  • Easy integration

    Effortless interconnection with your existing cloud PBX or our phone.systems™ business communication solution.

Extensive reachability

A single UIFN is reachable from 60 countries, with coverage being continually expanded.

Download the DIDWW price list

Tiered wholesale prices available

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coverage and pricing
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Frequently Asked Questions

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How do UIFNs work?
Universal International Freephone Numbers (UIFNs) are single Toll Free Numbers that are accessible from multiple countries. To dial a UIFN, customers must include the international prefix (e.g., 00 or +) followed by 800 and the unique 8-digit phone number. Businesses register UIFNs through an international toll free service provider, such as DIDWW, enabling seamless global communications in supported countries.
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What’s the difference between a UIFN and a regular Toll Free Number?
A UIFN is a single Toll Free Number that can be used across multiple countries, while a regular Toll Free Number is limited to only one country. UIFNs offer businesses a global reach with a single phone number, eliminating the complexity of managing multiple local numbers.
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Are UIFNs available in all countries?
UIFNs are available in many countries, but their reachability depends on local regulations. With DIDWW, we provide UIFN coverage in 60 countries, allowing businesses to maintain a global presence while offering a seamless Toll Free experience for customers worldwide.

VoIP use cases for your business

Learn what you can build with DIDWW cloud
communications

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    Why do customers choose DIDWW?

    The VoIP platform for telecommunication and business professionals

    Compliant two-way SIP Trunking, everywhere

    Compliant two-way SIP Trunking, everywhere

    Full global compliance in 94 countries and 5353 areas. Readily available Landline, Mobile and Toll Free Phone Numbers and two-way local SIP Trunking. Licensed or directly partnered with a local carrier in every country.

    Trusted by professionals

    • Nat Rudy

      C3ntro Telecom

      Carrier Interconnection Manager

      C3ntro Telecom

      “Always with the best disposition to serve us, DIDWW has helped us in fulfilling our customer’s needs, when it comes to provide them with the numbering solutions, when most of the time the requests get to us as urgent ones. Apart from everything else, it’s also fun and easy to work with DIDWW.”C3ntro Telecom

    • Dragan Gajovic

      Air Serbia

      IT Service Manager

      Air Serbia

      “We had a very fast integration with our IP voice system and their accessible and open procedures helped us reach our goals. During our contact center transition from an in-house solution to outsource solution, there weren’t any outages. The onboarding process was simple, fast and with substantial assistance.”Air Serbia

    • Andriy Azarov

      Nectar Desk Inc.

      CEO

      Nectar Desk Inc.

      “Virtual numbers and Phone Systems are essential parts of our offering, therefore DIDWW is one of the key components in our infrastructure. They have great support and high quality service. We became a client of DIDWW when we were very small, but still were treated in a proper way and were able to discuss business conditions, which helped our growth.”Nectar Desk Inc.

    Nat Rudy

    C3ntro Telecom

    Carrier Interconnection Manager

    C3ntro Telecom

    “Always with the best disposition to serve us, DIDWW has helped us in fulfilling our customer’s needs, when it comes to provide them with the numbering solutions, when most of the time the requests get to us as urgent ones. Apart from everything else, it’s also fun and easy to work with DIDWW.”C3ntro Telecom

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