Almost all cross-border enterprises deploying in the Vietnam market have encountered such a dilemma: the Vietnamese mobile number database collected at high cost, when used for Zalo private domain addition or marketing pushes, nearly 60% of the numbers either fail to be added, are inactive accounts, or even high-risk banned accounts. This not only wastes promotion budgets but also leads to a decline in account weight due to frequent outreach to invalid numbers, affecting subsequent operational results.

As the top 1 local social platform in Vietnam, Zalo has over 75 million monthly active users, covering almost the entire population of Vietnam. It also has an extremely high penetration rate in social e-commerce, logistics services and other fields. 49% of Vietnamese social e-commerce users complete shopping decisions through Zalo. For cross-border enterprises, Zalo marketing is the first choice to reach Vietnamese users. However, ordinary number verification tools are difficult to adapt to its localized characteristics, resulting in prominent problems of invalid numbers. So, why can Zalo become a traffic highland in the Vietnam market? How can enterprises achieve efficient screening of Zalo numbers with professional tools? NumVerix Zalo Number Filter Tool is precisely developed to address this core need.

I. Why Can Zalo Become the Traffic Core of the Vietnam Market?

Zalo's massive audience is not accidental; it stems from in-depth localized layout and full-scenario function coverage, which is also the core reason why cross-border enterprises deeply cultivate the Vietnam market:

• High User Penetration Rate, Covering All Groups: Zalo's user penetration rate in Vietnam exceeds 80%, with over 75 million monthly active users. Whether it is business groups in industrial agglomerations such as Ho Chi Minh City or ordinary consumers in remote areas, almost all use Zalo as their core communication tool, generating 2.3 million commercial conversations per day, providing enterprises with a broad outreach space.
• In-depth Adaptation of Localized Functions: Different from other overseas social platforms, Zalo is deeply integrated into Vietnamese daily life, supporting practical functions such as vaccine vaccination record inquiry, package logistics tracking, and ZaloPay electronic payment. It also launches commercial tools such as Official Account (ZOA) and Service Notification (ZNS), allowing enterprises to carry out operations in ways that users are accustomed to.
• Close Binding of Social E-commerce and Service Scenarios: Zalo has become an important carrier of Vietnamese social e-commerce, which can not only realize the closed loop of "communication - order placement - payment" but also precipitate private domain users through community operations. At the same time, logistics enterprises such as Best Express Vietnam have connected with the Zalo system, allowing users to directly query package status on the platform, providing natural operational scenarios for cross-border e-commerce, logistics and other enterprises.
• Local Trust Exceeds Foreign Platforms: As a social software developed locally in Vietnam, Zalo has extremely high trust in the hearts of users. Compared with foreign platforms such as WeChat, Vietnamese users are more willing to receive enterprise service notifications and marketing information through Zalo, which also improves the response rate and conversion efficiency of enterprise operations.

II. Usage Process of NumVerix Zalo Number Filter Tool

Targeting the localized characteristics of Zalo and Vietnamese operator rules, NumVerix has created a number filtering solution that can be quickly mastered without professional technical background. The core process consists of 5 steps, with full automation operation, significantly reducing labor costs:

1. Data Source Preparation: Organize Number List

First, sort out the enterprise's mobile number resources and organize the numbers into TXT format. During organization, ensure that each line contains only one mobile number and remove redundant annotation information (such as name and contact information) to avoid format interference with detection results.

2. Access NumVerix Detection System: Two Options Available

After logging into the official NumVerix platform, you can access the detection function in two ways: ① Online Detection Mode: Suitable for small and medium-sized teams, you can directly upload the number file on the platform for detection; ② API Interface Integration Mode: Embed it into the enterprise's existing CRM, marketing system and other platforms through API interface to realize seamless connection between number detection and subsequent operational actions, adapting to large-scale operational needs.

3. Configure Zalo Exclusive Detection Rules

After entering the "Data Detection" module, select the "Zalo Mobile Number" detection template from the platform list. At this time, the system will automatically match the interface logic and verification rules of the Zalo platform, including account registration status judgment standards, activation verification standards, banned risk marking, etc., avoiding misjudgments caused by differences in localized rules—which is also a core advantage that ordinary number verification tools cannot achieve.

4. Batch Upload and Start Detection

Upload the organized Vietnamese number file; the system supports single upload of more than 1,000 pieces of data. After clicking "Start Detection", you can view the detection progress in real time, including the number of completed tasks and the current detection status. During the detection process, the system conducts verification through the official authorized interface of Zalo to ensure the accuracy of results, and a single round of data can be completed in a few minutes.

5. Multi-Dimensional Result Classification and Export

After the detection is completed, you can export the full-version data table from the system, which clearly distinguishes number attributes: ① Registered and Active (can be prioritized for private domain addition and precision marketing); ② Unregistered on Zalo (can be used for new user expansion to improve registration conversion rate); ③ Inactive/Invalid Numbers (need to be removed from the number library to avoid resource waste); ④ High-Risk Banned Numbers (including high-frequency complaint and violation-related accounts, which must be resolutely avoided).

III. Which Scenarios Are Suitable for Zalo Number Filter Tool?

NumVerix Zalo Number Filter Tool can adapt to various core operational scenarios of cross-border enterprises in the Vietnam market, accurately solving efficiency problems at different stages:

• Precise Customer Acquisition in Zalo Private Domain: Screen "registered and active" Zalo numbers and prioritize private domain addition, which can increase the success rate of friend addition by more than 50% and reduce the impact of invalid attempts on account weight. At the same time, push customized marketing content to active users, such as new product discounts of cross-border e-commerce and service notifications of logistics enterprises, to improve conversion efficiency.
• Compliance Review for Bulk Registration: Before bulk registration of Zalo official accounts, pre-screen "unregistered and low-risk" numbers to avoid registration failures caused by using registered or high-risk numbers, reducing operational costs and account banning risks.
• Regular Cleaning of Existing Number Library: It is recommended to conduct a detection and cleaning of the enterprise's Vietnamese number library every week, removing newly added inactive and banned numbers, maintaining the freshness and accuracy of the number library, and laying a solid foundation for long-term operations.
• Precise Notification of Logistics Services: Cross-border logistics enterprises can screen user numbers registered on Zalo and push package tracking information, pick-up reminders, etc. through ZNS services to improve user experience and service response rate, which is also the mainstream operation method in the Vietnam logistics industry.

IV. Suggestions for Cross-Border Enterprises' Zalo Operations

Combined with the characteristics of the Vietnam market and Zalo platform rules, the following key points should be noted when using the number filter tool to improve operational effects:

• Control Outreach Frequency: Avoid high-frequency marketing information pushes to the same Zalo number. It is recommended to reach out no more than twice a week to reduce the risk of user complaints.
• Operate in Combination with Active Time Periods: According to Vietnamese users' habits, prioritize private domain addition or message pushes from 20:00 to 22:00 Vietnam time. The user response rate during this period is more than 80% higher than that in other periods.
• Data Stratified Operations: Combine the detection status of Zalo numbers with user portraits to divide levels such as highly active business users and ordinary consumer users, and formulate targeted operational strategies to improve resource utilization efficiency.

Conclusion

Zalo's over 75 million users are the core growth driver for cross-border enterprises deploying in the Vietnam market, but the problem of invalid numbers often becomes an operational stumbling block. With core advantages such as in-depth adaptation to Vietnamese localized rules, multi-dimensional precise detection, and full-process automated operations, NumVerix Zalo Exclusive Number Filter Tool solves the pain points of ordinary tools such as "high misjudgment rate and poor adaptability", enabling enterprises to accurately reach effective users with every Zalo outreach.

Whether it is a cross-border e-commerce enterprise, a logistics service enterprise, or a social promotion team, choosing NumVerix Zalo Number Filter Tool is a key step to improve operational efficiency and reduce compliance risks in the Vietnam market. For more details on the tool or localized operation solutions, you can contact NumVerix official customer service for exclusive support.

About NumVerix

NumVerix is a global number verification service provider, with its services covering over 200 countries. It specializes in offering one-stop real-time verification solutions for enterprises. Its core products fall into two key segments: Number Verification (including Basic, HLR, MNP, and FraudShield) and Social/App Platform Verification(covering more than 10 mainstream platforms such as Facebook, Zalo, email services, Binance, and KuCoin).

Through functions like invalid number detection, activation status detection, and activity detection, NumVerix helps enterprises accurately screen real users. Leveraging a massive global real-time database, it empowers enterprises to achieve the digital development of global precision marketing.

• Visit the official website for a free trial
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• Official business telegram: @Numverix

Details on the selection of international verification tools can be referenced→《Common Misconceptions About International Number Verification Platforms: How to Choose the Right Tool?》

For avoiding the risks of virtual numbers, you can refer to it→《International Number Verification: Identify Real Active Customers & Mitigate Virtual Number Risks》