How much can WhatsApp's last seen time tell you? Learn how to accurately identify active users.

Customer status changes dynamically. A number that was valid last month may have been shut down this month, and a user who was active last week may have uninstalled the app this week.

The system automatically removes unused and abnormal accounts, combining self-screening and proxy filtering to improve data quality and facilitate precision marketing.The cloud control system supports active, online, and duration filtering, allowing marketing teams to understand target account activity patterns and optimize campaign effectiveness.

It offers self-screening and proxy filtering modes, combining account data from multiple platforms to achieve efficient management and targeted campaigns for massive accounts. The system enables precise filtering by age, gender, interaction frequency, and online time, facilitating the implementation of social media marketing strategies.The cloud control system supports batch generation of mobile phone numbers for Japan, India, Mexico, and the United States, leveraging account activity and engagement to achieve targeted cross-platform outreach.Through interaction, active, and online filtering, you can quickly identify potential users, making social media operations more efficient and precise.

The cloud control system offers customized and refined filtering modes, ensuring that every outreach campaign precisely targets your target user base and boosting your social media conversion rate.The system automatically detects unused and anomalous accounts, and uses age, gender, and activity level to filter, ensuring clean marketing data and more efficient outreach.

The cloud control system manages accounts across multiple platforms in one place, enabling batch filtering and efficient operations, saving manual time and improving work efficiency.

Through avatar, gender, and interaction filtering, you can precisely target potential customer groups, significantly improving the conversion rate of social media outreach.I went through a lot of detours because I neglected WhatsApp number filtering: from incorrect number formats to inefficient manual verification, until I discovered the ITG global filtering tool, which truly unlocked the secret to efficient number filtering.

From format misjudgment to the inefficiency of manual verification, and then to the intelligent leap of ITG's full-domain filtering, my WhatsApp number filtering journey has made me deeply aware of its value.With its advanced algorithms and massive data processing capabilities, WhatsApp number screening can not only efficiently verify number activity but also significantly improve marketing conversion rates.

In the digital marketing arena of 2025, Telegram's number-checking system has become an essential tool for precision marketing, especially when combined with WhatsApp's number-checking technology, which can maximize cross-platform customer reach.Telegram's number filtering system not only efficiently filters invalid numbers, but also uses big data analysis to identify active users, helping marketers avoid wasting resources.