Practical tutorial on multi-platform number screening: batch screening of numbers by Telegram / WhatsApp / Line / Zalo target platform

The starting point for overseas customer acquisition is often a batch of mobile phone numbers, but the validity, activity, and even user gender and age of the numbers need to be verified. Number filtering (commonly known as “number screening”) can batch detect whether the number is registered on Telegram, WhatsApp, Line, Zalo and other platforms, whether it has been online recently, and the gender and age information in the public information. This article takes the four mainstream overseas platforms of Telegram, WhatsApp, Line, and Zalo as examples to teach you step by step the entire process of multi-platform number screening, and shares practical tips for saving costs and avoiding repeated testing.

What is multi-platform number filtering? Why is it indispensable to acquire customers overseas?

Multi-platform number screening refers to performing activation detection, activity detection, gender/age detection on the same batch of mobile phone numbers on Telegram, WhatsApp, Line, Zalo and other platforms respectively, and finally obtains a structured result (including whether to register, recent active time, gender, tgid/wsid/uid and other fields). For overseas marketing teams, this solves three core pain points:

1. Uncontrollable number quality – The purchased number list may contain a large number of useless numbers that have been canceled or not registered on the target platform, and direct marketing will cause a lot of waste.
2. Missing user portrait – Only the number is known but the user activity, gender, and age are not known, making it difficult to accurately target (such as pushing game advertisements to men around 30 years old).
3. Cross-platform reuse – A number may be silent on WhatsApp but active on Telegram or Line. Multi-platform filtering can help you find the best reach channel.

Therefore, whether you are doing community operations, private message promotion or cross-border email marketing, number screening is the first step in data cleaning.

What do I need to prepare before number screening?

Before starting screening, please make sure you have completed the following preparations:

• Valid mobile phone number list – Must comply with E.164 international format (such as 8613812345678), no spaces or dashes.
• Select target platform – Specify which of Telegram, WhatsApp, Line, and Zalo you want to detect, and the detection type (activated/active/gender).
• Recharge account balance – KK-DATA adopts pay-per-item billing and no subscription package. The recharge method supports USDT (TRC20), with a minimum of about 50 USDT. Different platforms and different detection types have different unit prices. The system will display the estimated cost before submitting the task. Please refer to [Console Real-time Price] (https://app.kkdata.cc/).
• Understand detection types - “Open detection” only verifies whether you have registered; “Activity detection” determines whether you have been online recently; “Gender detection” additionally extracts gender, age, avatar and other fields from public information (accuracy rate varies by platform).

Mobile phone number source and format requirements

The source of the number can be your own machine room data, a purchased number package, or a number generated for free through the platform’s “Global Number Generation” module. The generation function supports 240+ country/region code segments. There is no deduction for generation, only filtering and per-item billing. The number format must be 国家代码 + 号码, such as 8618612345678 (China), 84931234567 (Vietnam). It is recommended to remove spaces, dashes, and + signs.

Platform unit price and estimated cost

KK-DATA has independent unit prices for different platforms and different detection types. When creating a task in the console, the system will automatically calculate the estimated cost based on the number of numbers and the selected detection type, and will only execute it after confirmation. You don’t need to calculate in advance, and you don’t need to worry about wasting packages. For details, please see official website billing page.

How to filter numbers for Telegram?

Telegram is a popular platform for overseas marketing, especially in Russia, Southeast Asia, and the Middle East, with a huge user base. The following steps demonstrate how to filter numbers on Telegram.

Step 1: Submit Telegram activation detection task

1. Log in to KK-DATA Console and enter the “Screen Number Task” module.
2. Upload your number file (supports CSV/TXT, one number per line).
3. Select the platform as “Telegram” and the detection type as “Telegram activation”.
4. Submit the task after confirming the estimated cost. Wait for the task to complete (usually a few minutes to tens of minutes, depending on the number of numbers).
5. Export the results. The table will contain fields such as tgid (Telegram’s internal unique user ID), 开通状态, and 注册时间.

Step 2: Add activity and gender filtering

For already activated numbers, you can continue to perform activity detection and gender detection.

• Telegram Activity Detection: Select “Telegram Activity” in the results of the previous step to set the activity window (such as the last 7 days, 30 days). Activity detection will determine whether the user has been online recently, which is the key to distinguishing valid users from zombie accounts.
• Telegram Gender Detection: Submit the “Telegram Gender” task to active users, and the results will include fields such as 性别, 年龄, 头像, etc. Note: The age field is a general range inferred based on the user’s public information (such as about 30 years old), not accurate to the ID card level, and can assist targeting.

How to filter numbers for WhatsApp?

WhatsApp is the instant messaging tool with the highest coverage in the world, with a high proportion of users in Latin America, India, and Europe. The screening process is similar to Telegram, but the fields are slightly different.

WhatsApp open detection vs active detection

• Activation Test: Verify whether the number is registered with WhatsApp (return 开通 / 未开通). The activation test can only determine whether the user is registered, but cannot know whether the user is still using it.
• Activity Detection: Further determine whether the user has been online recently (usually 7 days is used as an example). For e-commerce and customer service scenarios, it is recommended to screen for activation first, and then perform activity detection on the activated number to filter out silent users.

WhatsApp gender detection and precautions

WhatsApp’s gender detection is based on user avatars, nicknames, and public information, and its accuracy is lower than Telegram’s. Therefore, if your marketing has high gender requirements, it is recommended to combine multi-platform data cross-validation. For example, if the same number is judged to be male on Telegram and unknown on WhatsApp, you can trust Telegram’s results first.

How to filter numbers for Line?

Line has a deep user base in Taiwan, Japan, Thailand, and Indonesia, and is an important channel for overseas expansion in Asia. The screening process is equally simple.

Line activation detection and uid export

Select the “Line activation” detection type, and in addition to returning the activation status, the results will also be exported Line uid. This uid is the unique user ID of the Line platform and can be used for subsequent peer-to-peer marketing (such as sending messages through the Line API). Note: The Line platform has strict restrictions on third-party marketing, please use it in compliance.

Line gender filter: Target male/female users

If you need to target gender (such as pushing beauty content to female users), you can submit the “Line Gender” detection task. The results include a gender field that filters for males or females. Note: Line’s gender recognition rate varies by region. The recognition rate in Japan is higher, followed by Taiwan.

How to filter numbers for Zalo?

Zalo is Vietnam’s national messaging app, covering more than 70% of smartphone users in Vietnam. With the boom in overseas expansion in Southeast Asia, Zalo has become the core customer acquisition channel for Vietnam’s e-commerce, gaming, and financial industries.

Zalo activation and activity detection

The steps are the same as the first three platforms: Upload number → Select “Zalo activated” or “Zalo active” → Submit → Export the results. Zalo activity detection is particularly important for tracking real Vietnamese users because there are a large number of numbers in Vietnam that have been registered and not used for a long time.

The value of Zalo screening numbers to customer acquisition in Southeast Asia

In Vietnam, Zalo is not only a chat tool, but also a unified entrance for shopping, payment, and customer service. Screening out active Zalo users in advance can greatly increase marketing reach and reduce the cost of invalid numbers. It is recommended to give priority to detecting the Vietnamese local mobile phone number segment (+84), and you can use the global number generation module to obtain the Vietnamese number segment for free.

Best practices for simultaneous screening on multiple platforms

When operating multiple platforms at the same time, the following tips can help you save money efficiently:

1. Use data deduplication warehouse: KK-DATA provides data deduplication function. When uploading numbers, it will automatically compare historical tasks, and the numbers that have been detected will no longer be deducted repeatedly. It is recommended to upload all numbers to the deduplication warehouse first, and then perform screening in batches.
2. Arrange tasks according to priority: First do the activation test of all platforms (the lowest cost), then do the activity detection of the activated numbers, and finally do the gender detection of the active users. This avoids wasting costly types of detection on invalid numbers.
3. Use task notifications: Turn on Telegram notifications in the console. After the task is completed, the robot will push a reminder to facilitate timely export of results.
4. Multi-task parallel: Screen number tasks on different platforms can be carried out at the same time without interfering with each other. For example, submit Telegram activation and WhatsApp activation at the same time to save waiting time.

FAQ

**Q: Can number screening detect multiple platforms at the same time? **

Answer: Yes. KK-DATA supports submitting number screening tasks separately on multiple platforms, and can also perform screening on multiple platforms such as Telegram, WhatsApp, and Line for one number database at the same time. Each task is billed independently, and the result fields do not affect each other.

**Q: What is “activation” testing? What is the difference from “active” detection? **

Answer: The “activation” test only verifies whether the mobile phone number is registered with the corresponding platform (Telegram/WhatsApp, etc.), which may include users who have not logged in for a long time; the “active” test will further determine whether the user has logged in in the recent period (such as the past 7 days). When doing marketing and promotion, it is generally recommended to screen for activation first, and then screen for activity to reduce invalid contacts.

**Q: Is the “gender” field in the screening results accurate? Can it be used for age targeting? **

A: Gender and age data come from public user information, and the accuracy varies between platforms. Telegram’s gender field is usually richer (available for extracting avatar, name, bio for inference), but it is not 100%, nor is it equivalent to a real-name ID card. The age field provided by the platform can be used to filter for a general age group (such as “about 30 years old”), but it cannot be precise to a specific date of birth. It is recommended to use gender and age as an auxiliary directional signal rather than the only criterion.

**Q: What is the use of uid/tgid/wsid exported after number filtering? **

Answer: These internal IDs can be used for operations such as adding friends in batches, sending group private messages, and recruiting groups. For example, Telegram’s tgid is a unique user ID. After exporting, it can be used with automated tools to directly reach out to the selected active users for a second time, greatly improving efficiency.

**Q: If there are duplicate numbers in my number package, will there be repeated deductions? **

Answer: It is recommended to use the “data deduplication warehouse” function that comes with the platform. When uploading numbers, it will automatically detect already detected numbers to avoid repeated charges. If the activation test is performed first, and then the active detection is performed based on the results, the platform will not re-count the numbers that have been deducted for the activation test, and will only deduct the fee for the new detection type.

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Now you have the complete method of multi-platform number screening. From number generation and activation detection to activity and gender targeting, KK-DATA can be completed in one stop. Start your first number screening immediately, improve the quality of the numbers first, and build an efficient overseas customer acquisition channel.

👉 Log in to the console to start screening numbers Two-way contact customer service: If you encounter any problems, please contact https://t.me/kkdata_robot directly