Phone Number Testing Services
When testing international phone numbers and telecom platforms worldwide you need to ensure your telecom operations are fully functional. Whether your business utilizes international toll-free numbers (ITFS), DiD numbers, universal international freephone numbers (UIFN), or anything in between, we provide the most accurate phone number testing
Global Telecom Testing’s comprehensive in-country live phone number testing ensures that your worldwide telephone numbers and toll-free numbers are functioning properly locally. Live test calls are the most important testing benchmarks because only this type of testing accurately simulates in-country user experience to detect call failures, provide sound quality testing, and identify QoS issues.
Elevate Your Customer Experience With GTT
Testing is performed by local testers in worldwide cities with all the variables and idiosyncrasies that customers encounter, such as, geographic restrictions, service limitations, incorrect dialing codes, etc. Testing ensures that lines are problem-free, the message is correct, language and dialect is correct, voice and DTMF prompts are working, and that IVR platforms are functioning properly. We also provide caller ID testing to make sure phone numbers are displayed accurately on recipients’ screens, as well as echo testing for phone numbers to ensure minimal issues with call quality.
Detailed Call Display Records (CDRs) are generated for each phone number test call made by GTT’s testers. These CDR’s can be presented to customers as proof of completed calls or to worldwide telecom providers to open service tickets.
Our Comprehensive Testing Services
New Number Provisioning Testing: Before putting newly provisioned numbers into service, it is imperative to ensure that they are operational. In-Country local testing ensures your numbers are functioning properly and can deliver consistent results.
Post-Delivery Testing: When you test phone call quality after your numbers are put into service, you can verify that they are working and troubleshoot any issues reported by your staff and/or customers.
Live Co-op Testing (Call Traps): If having persistent issues with in-country number(s), the best way to troubleshoot is a call trap. We will work with you to set up this specialized testing with your NOC, GTT’s in-country phone number tester(s), and/or the local telecom providers. All parties participate in real-time test calls initiated by GTT’s local tester(s), to identify and isolate service issues.
Opening In-country Service Tickets: When a GTT test call has failed, you can request our local tester to open a service ticket with their local provider. This provides you the most accurate, efficient, and the quickest response for correcting and resolving call failures. If the local carrier cannot fix the issue, our tester’s information can be presented to your telecom department or telecom provider.
Low Volume Number Repossession Testing: We have learned that several worldwide telcos have implemented 90 day voice traffic minimums on their ITFS numbers, without informing their customers. Worldwide numbers can be disconnected and re-possessed after 91 days of not meeting their voice traffic minimums. Be sure to check with your carriers to see what, if any, the monthly or quarterly voice traffic minimums are for your numbers. Our testers will make test calls on these numbers to help ensure you are meeting your monthly or quarterly traffic minimums.
Load and Congestion Testing: Your numbers are meant to handle a large number of simultaneous calls. Multiple local testers will test your phone lines by making back-to-back and simultaneous test calls to confirm your number(s) can handle the simultaneous load. Our bandwidth quality testing gives you the confidence that your numbers can withstand the pressure of real-world use.
Fax Testing: Due to a multitude of regulatory requirements, many industries still rely on faxing documents for internal and external usage. Companies must also provide proof that their fax numbers are working properly for compliance requirements. Our local testers will send and receive faxes to verify your fax numbers are operational.
Testing Variables: GTT has testers in multiple regions of each country, using various landline and mobile networks, handsets, and operating systems. This enables us to uniquely in-country test your numbers while applying a multitude of real-world situations.
Call Latency Testing: If your system has high latency, customers can perceive a delay between when they speak and when the representative on the other end responds. This can create a feeling of distance and hurt the overall experience. We can conduct audio latency tests to determine how well your system performs. An audio delay test can ensure your system performs as well as it should.
Scalable Plans to Meet Your Needs
Contracted customers: Customers who sign a 12-month SLA with us benefit from the use of all of our services and testing options while being billed monthly. There are no monthly, quarterly, or annual testing minimums or fees. We will only charge you for the services you use each month.
Pre-Paid customers: You will have access to all of GTT’s services and testing options, but all services are paid for prior to testing.
Economy Testing: GTT provides economy testing at a flat rate per number (2 test calls per number) on designated testing days. Test requests are required to be received by our NOC by the testing deadline, which is approximately 2 business days prior to the date the number will be tested.
Hourly Testing: Testing is charged per hour, per country, per tester instead of a by number basis. This testing is a great option for co-op testing, load, and congestion testing, and for testing large amounts of numbers in a single country.
Expedite/ASAP Testing: Need any type of testing now? Our expedite/ASAP testing has a turnaround time of 18 hours or less.
We’ve helped countless global brands test and adjust their phone operations for improved performance, usability, and customer satisfaction in the most remote locations. Most of the time, we can identify cost-saving opportunities and uncover errors that have been continuously overlooked. Test international phone numbers, bandwidth quality, and overall telecom performance with the experts at Global Telecom Testing.
If you’d like to get started or sign up for a complimentary trial test, contact us today!
Test your Phone Numbers with the Pros
Optimize the performance of your global phone capabilities and save money
on unnecessary costs from your network carriers.
Phone Number Testing FAQs
Phone number testing verifies that international and toll-free numbers connect correctly to their intended destination. It checks formatting, reachability, and routing protocols to confirm calls are properly directed.
GTT’s phone number testing services simulate real-world usage across multiple networks and regions. Tests cover inbound and outbound calls, verifying that numbers reach the correct endpoints without interruptions. Toll-free number testing evaluates dedicated service numbers, while mobile phone test numbers check connectivity and quality across cellular networks.
This comprehensive approach identifies misrouted calls, network issues, or configuration errors before numbers are deployed. It helps companies maintain accurate and reliable communication for both customers and internal operations.
We test phone number formatting, reachability, and numbering plans by validating numbers across multiple countries and regions. This confirms that each number complies with international formats and local dialing conventions, helping maintain accurate call routing and accessibility.
Our test phone numbers cover global regions to support both toll-free number testing and mobile phone services. We perform in-country testing to verify that numbers connect correctly and remain operational across different networks.
During this process, we identify misconfigurations, unreachable numbers, and routing issues. This comprehensive testing approach helps businesses prevent call failures, improve customer experience, and maintain reliable communication for both internal operations and client-facing services.
Phone number testing is vital to make sure calls are correctly routed and reach the intended recipient. Misrouted or unreachable numbers can cause lost business, frustrated customers, and damaged reputation.
GTT’s phone number testing services simulate real-world call conditions across over 200 countries. Toll-free number testing evaluates dedicated service lines, while mobile phone test numbers verify routing on cellular networks. Tests detect misconfigurations, incorrect formatting, or network incompatibilities.
Phone number validation provides confidence that your business communications will work as intended, minimizing errors and supporting smooth, reliable customer interactions. Early detection of issues reduces downtime and improves overall operational efficiency.
Yes, we can detect latency issues that affect the quality and timing of calls, impacting overall customer experience.
Our phone number testing services use echo test phone number calls and real-time analysis to track latency, packet loss, and connection performance. This testing uncovers network bottlenecks, regional variances, and potential disruptions in call delivery.
With these insights, businesses can take corrective actions to reduce delays, enhance audio quality, and maintain consistent, timely communication. Accurate latency testing improves customer satisfaction, prevents service complaints, and supports high-quality global phone operations.
Yes, we can pinpoint whether latency originates from the carrier network or your internal system infrastructure. Understanding the source of delays allows businesses to address problems effectively and maintain smooth communication.
Using mobile phone test numbers and end-to-end live testing, our phone number testing services evaluate each stage of call routing. We track call setup, transmission, and receipt to distinguish between network and system issues.
This data helps recommend precise solutions, whether adjustments are needed on carrier networks or internal configurations. Identifying the cause of latency prevents recurring disruptions, supports fast and reliable calls, and improves overall user experience.