Precision in Number Portability: Velocity Navigates the Mobile Switching Maze

Being stuck with the same telecom service provider has always been an impediment to healthy competition between mobile operators. In the past, subscribers were discouraged from switching their service because they had to give up their number. So, even if other mobile operators offered cheaper services, people mostly stayed with their current provider.

Then came Mobile Number Portability — a technology that offered subscribers the possibility to switch service provider but retain their phone number. First introduced in 1997 in Singapore, then in the United Kingdom, Hong Kong and the Netherlands, it is now widely implemented in varying ways across the globe.

Whilst this service is great for consumers it causes headaches for companies sending large amounts of SMS and voice calls, because they may not know how to route the traffic correctly if the number has been ported.

What is number portability?

Number portability is a telecommunications feature that allows mobile and landline users to switch network providers while keeping their existing phone number. This capability enhances consumer choice, encourages competition among telecom operators, and enables businesses to maintain continuity in customer communications.

In many countries, Mobile Number Portability (MNP) is regulated to ensure users can seamlessly transfer their numbers without service disruptions. However, managing number portability presents challenges for telecom providers, particularly in routing calls and messages accurately after a number has been ported. Without precise routing data, businesses and service providers may encounter misrouted traffic, increased costs, and security vulnerabilities.

What is number portability routing?

Number Portability Routing (NPR) is the process of accurately directing calls, SMS messages, and digital communications to the correct network after a phone number has been ported from one mobile operator to another. When users switch providers while retaining their existing phone number — a process known as Mobile Number Portability — service providers must update their routing systems to ensure uninterrupted connectivity.

Why is number portability routing important?

When a number is ported, it no longer belongs to its original carrier. Without accurate routing information, businesses and service providers may experience:

• Failed or misrouted calls and messages: outdated network data can lead to delivery failures, affecting customer interactions and authentication processes.
• Higher operational costs: routing errors can increase telecom costs, especially for enterprises handling large volumes of calls and SMS traffic.
• Security risks and fraud exposure: fraudsters exploit weaknesses in number portability to conduct SIM swap fraud, account takeovers, and phishing scams.

How does number portability routing work?

• Real-time lookup services: advanced number intelligence platforms query live telecom databases to determine the current network of a mobile number.
• Optimised call and message routing: once a number is ported, intelligent routing systems ensure that communication is delivered to the correct mobile network without delays.
• Fraud prevention and compliance: real-time verification helps detect anomalies in ported numbers, reducing the risk of fraudulent activity and ensuring compliance with telecom regulations.

Accurate number portability routing is essential for telecom operators, financial institutions, and businesses that rely on secure, uninterrupted mobile communications. By integrating intelligent number lookup solutions, organisations can enhance call efficiency, reduce fraud risks, and improve customer experience in a mobile-first world.

How does Velocity help with number portability routing?

At TMT ID we have a solution to this. Our Velocity service identifies the current network provider for any number anywhere in the world. Our support teams have integrated a full number range plan, mapping all allocated and available number ranges to operators. Therefore, even if a number is not in our portability database because it has not been ported yet, we can return the correct routing information.

Velocity streamlines number portability routing by providing real-time, accurate number intelligence to ensure efficient call and message delivery. Ported numbers often require updated routing information to avoid failed connections, increased latency, and unnecessary charges. Velocity solves these challenges with:

• Real-time number intelligence: Velocity instantly verifies whether a number has been ported, retrieving the most up-to-date network operator details.
• Optimised call and message routing: ensures that voice calls and SMS traffic are directed correctly, preventing failed deliveries caused by outdated carrier information.
• Reduced fraud and security risks: by detecting anomalies in number portability changes, Velocity helps businesses combat fraud attempts such as SIM swap scams and unauthorised call rerouting.
• Improved customer experience: whether for customer service, authentication, or business communications, Velocity helps companies maintain seamless interactions with their users, even when they switch networks.

By leveraging Velocity’s precision in number portability routing, telecom providers, financial institutions, and digital platforms can enhance efficiency, reduce operational costs, and improve security across their mobile interactions.

Our customers use our service hundreds of millions of times every day, billions of times every month. They use TMT ID because we help them reduce costs, provide a superfast response time and improve their delivery success rate.

At present the most popular countries for this service are India, Japan, France, Brazil and the United Kingdom, and we are introducing new countries with Number Portability all the time. We have recently introduced China, the Faroe Islands and Uzbekistan, and are due to go live with Ireland and the Philippines soon, migrating them to MNP data sources.

TMT ID has truly global coverage, having access to porting information for the countries where portability services have been enabled. Our data is from authoritative sources such as regulators and mobile network operators, updated at least once a day to ensure our customers get the most accurate porting information.

To learn more about the difference between mobile number portability and HLR lookups, you can read our related article.