When doing Zalo marketing in the Vietnam market or global Facebook promotion, have you encountered these issues: only 30,000 out of 100,000 Zalo marketing messages successfully delivered; most numbers driven by Facebook ads are unregistered on the platform, leading to no responses to private messages; frequent addition of invalid numbers results in account function restrictions. In fact, 60% of social media marketing waste stems from failing to verify number registration status in advance—unregistered or long-dormant numbers not only fail to convert but also trigger platform risk control. NumVerix has developed exclusive verification solutions for Zalo and Facebook, enabling social media marketing to accurately reach real users.

I. Two Core Reasons for Failed Social Media Marketing Reach

1.Unregistered numbers on target platforms

Many overseas numbers are only used for calls and not registered on Zalo or Facebook. Direct message delivery will show "unregistered" or "undeliverable", wasting marketing resources.

2.Long-term dormancy after registration

Some numbers are registered on the platform but haven't logged in or interacted for a long time, making them "zombie accounts". Messages sent to these accounts get no responses, reduce account engagement rates, and affect subsequent marketing weight.

II. NumVerix Zalo/Facebook Verification: 2 Steps to Filter Valid Registered Users

NumVerix connects to the official data interfaces of both platforms, focusing on "registration status + basic information verification" to adapt to the entire social media marketing process.

1. Zalo Number Verification

• Core function: Quickly determine if a number is registered on Zalo, synchronously return the country code, and eliminate unregistered numbers.
• Regional adaptation: Accurately identify numbers from major Vietnamese operators like Viettel and Vinaphone, avoiding verification deviations caused by incorrect number segment judgment.
• Batch processing: Supports verification of 2 million numbers at a time, meeting user screening needs before large-scale promotions in Vietnam.

2. Facebook Number/Email Verification

• Dual verification: Supports both phone number and email verification to confirm Facebook account registration, avoiding misjudgments from single verification.
• Basic information synchronization: Returns account registration status (active/dormant) to help enterprises prioritize reaching active users.
• Risk control alerts: Marks Facebook accounts frequently reported or high-risk, reducing the risk of marketing account restrictions.

III. Practical Application: Precision Screening Process for Social Media Marketing

• Pre-marketing: Use NumVerix to batch verify the platform registration status of numbers/emails, eliminating unregistered and high-risk users.
• Regional segmentation: Zalo verification focuses on the Vietnam market, while Facebook verification splits number databases by target regions (e.g., Southeast Asia, Europe, America).
• Outreach optimization: Customize localized content for registered active users (e.g., Vietnamese Zalo offers, English Facebook new product notifications) to improve response rates.

IV. Core Advantages: Adapting to Efficiency Needs of Social Media Marketing

• High accuracy: Connects to official platform data sources with ≥95% accuracy in registration status identification.
• Easy operation: Directly upload number databases through the web backend, no technical integration required—beginners can get started in 10 minutes.
• Controllable costs: Pay-per-verification model, affordable for small and micro enterprises, avoiding fixed cost pressure.

The key to Zalo and Facebook marketing is "finding real registered users". Through precise verification, NumVerix helps enterprises avoid invalid number traps, boosting reach rates and account security.

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.