Zalo Number Screening: The Key to Opening the Vietnamese Market

In response to the "multi-account switching" characteristic of the Indian market, the system identifies "primary accounts" (highly active and linked to real information) and "secondary accounts" (lowly active and used temporarily), prioritizing the primary account for marketing campaigns. In response to the "GDPR compliance requirements" of the European market, the system automatically filters out accounts that are not authorized to receive marketing messages.

In the digital marketing wave of 2025, WhatsApp filtering became an essential lesson I couldn't avoid. With over 2 billion WhatsApp users worldwide, accurate WhatsApp filtering directly determined the effectiveness of my promotions.Initially, I thought it was just a simple task of filtering phone numbers, but I ended up taking a lot of detours.

From blind optimism based on "format" to the inefficient and torturous process of manually dialing, and then to discovering the power of ITG's global filtering tool, I finally figured out an efficient method for filtering WhatsApp numbers.This article will share my experience and guide you through the latest WhatsApp number filtering strategy for 2025, with the core tool being ITG full-domain filtering.When I first started screening WhatsApp numbers, I naively thought that as long as the number format "looked right," it was a good number.

This made me realize that the first step in WhatsApp's number screening process is not format calibration, but rather having a scientific verification system.Manual verification is suitable for small-scale testing, but when faced with a database of 100,000+ phone numbers, it's simply asking for trouble.

This tool has completely changed the way I work, not only boosting my efficiency but also making the screening results incredibly accurate.

With over 3 billion WhatsApp users, accurate WhatsApp number filtering is not only key to improving conversion rates, but also an essential means to avoid wasting resources and compliance risks.The system provides automatic inactive account removal, combining active, online time, and interaction frequency filtering to ensure your campaigns reach your target audience and improve conversion efficiency.

The cloud control platform supports both self-screening and proxy screening, eliminating manual effort and easily managing batch account screening and management across multiple platforms, saving your team significant time.Using avatar and nickname filtering, you can quickly identify potential customer groups, achieving precise and high-ROI social media promotions.

The system supports batch generation and filtering of mobile phone numbers in regions like India, Japan, and Mexico, enabling cross-border marketing campaigns to reach target users more quickly and efficiently. The cloud-based control system combines interaction and online filtering to monitor target account activity patterns in real time, ensuring every ad campaign reaches high-potential customers.Whether it's Telegram, LinkedIn, or Facebook, the system offers unified management and batch filtering based on age, gender, and activity level, enabling precise multi-platform campaigns.