Complete guide to number screening: from number segment generation to available list (Telegram/WhatsApp multi-platform)

If you are engaged in overseas marketing, cross-border e-commerce or community operations, you must have encountered this situation: you bought a batch of numbers and blindly typed private messages, only to find a large number of empty numbers, unregistered or long-term inactive users, which wasted time and budget. Number screening is the key to solving this pain point - it helps you extract the truly “available” list from the original number segments by batch detecting the registration status, activity, and even gender and age of the numbers on Telegram, WhatsApp, Line, Zalo and other platforms, making every contact more valuable.

This article will start with number generation, and gradually dismantle the complete process of multi-platform screening, data deduplication, and export. It will also focus on the operational points of key platforms such as Telegram, WhatsApp, and Line to help you build an efficient and reusable screening system. Whether you are running a team or promoting personally, you can find practical steps and pitfall avoidance suggestions.

What is number screening? Why do you need to screen numbers when acquiring customers overseas?

Number screening, simply put, is to batch detect the status of a batch of mobile phone numbers on different social/communication platforms, such as:

Have you registered Telegram, WhatsApp, or Line?
Have you been active recently? (For example, you have logged in in the past 7 days or 30 days)
What is the account gender and age (supported by some platforms)?

In the past, many teams used the “random blind typing” method - receiving the numbers and sending them directly to groups. As a result, the response rate was extremely low, and a large number of numbers were invalid or even blocked. Number filtering allows you to eliminate “dead numbers” before sending messages, and only sends messages to valid, active, and even gender-specific users. The cost is reduced by more than 50% and the conversion rate is significantly improved.

Scene	Touch typing	Filtered by numbers
Cost	Each message is charged, and invalid numbers waste budget	Only sent to activated/active numbers
Efficiency	A large number of repeated sendings are required, and the account may be blocked by the platform	The list is accurate, the number of sendings is small, and the risk is low
Orientation ability	Unable to distinguish gender, activity level	Can filter women/men, recent activity, etc., more accurately

For scenarios such as Telegram community operations, WhatsApp B2C promotion, and Zalo customer acquisition in Vietnam, number screening has become a standard tool. It allows you to “spend your money wisely” in the first step of going overseas.

Complete workflow of number screening: from number segment to available list

A standard screening process consists of four stages: Generation/Import → Multi-platform filtering → Data deduplication → Export list. Let’s break it down one by one.

Step one: Number source - global number segment generation and custom CSV import

Where do the numbers you need to filter come from? Two main channels:

Global number generation: Many number screening systems (including KK-DATA) have built-in number segment libraries for 240+ countries. You can randomly generate large batches of numbers by country, operator or even number segment prefix. This step is completely free, and the generated numbers can be temporarily stored, and fees will be deducted on a per-item basis during subsequent screenings.
Customized CSV import: If you already have a ready-made number list (such as clues collected from exhibitions and advertising platforms), directly upload the CSV file, and the system will parse and add the screening task.

Operation Suggestion: After generating or importing, first do a “quick activation test” to eliminate unregistered numbers, and then do an in-depth test for the platform that needs targeting. This avoids wasting the cost of advanced detection on invalid numbers.

Step 2: Multi-platform screening - activation, activity, gender detection

This is the core step. There are slight differences in the detection types supported by different platforms:

Platform	Activation Test	Activity Test	Gender/Age	Others
Telegram	✅ Registration detection	✅ Active window can be specified (such as 7 days/30 days)	✅ Contains gender and age fields, age is a rough range	Can export tgid
WhatsApp	✅	✅ Activity Window	✅	—
Line	✅	✅	✅ Support male/female targeting	Export uid
Zalo	✅	✅	✅ (for Vietnam market)	—
iOS/iMessage	✅ iMessage valid detection	—	—	Check if it is an iMessage number
RCS	✅	—	—	—

You can select multiple platforms and detection types at one time, and the system will process them in parallel and merge the results after completion. A single task supports a maximum of approximately 1 million numbers.

Step 3: Data deduplication and export - avoid repeated detection and improve efficiency

Many people have made a mistake: the same number is tested repeatedly in different tasks, and the fee is deducted in vain. A good number screening system will provide a data deduplication warehouse - the uploaded number list will automatically be compared with historical results, and the numbers that have been detected will no longer be deducted repeatedly, and the previous status will be directly reused.

CSV, TXT and other formats are supported when exporting, and the fields can be customized. For example, only export numbers that are “Telegram has been activated and the gender is male”, or only export numbers that are “WhatsApp has been active in the past 30 days and Line has been activated”. Flexible combinations make your list cleaner.

How to filter valid Telegram numbers? Detailed explanation of activation detection and activity

Telegram is one of the most commonly used platforms for overseas operations. When screening accounts, focus on three dimensions:

tg activation detection: Confirm whether the number has registered a Telegram account. This is the most basic screening and the prerequisite for all subsequent operations.
Activity Window: You can specify to detect users who have logged in within the “past 7 days”, “past 30 days” and “past 90 days”. It is generally recommended to give priority to “7 days” or “30 days”. These users have a higher probability of opening notifications and responding.
Gender and age fields: Some screening systems (such as KK-DATA) will return public fields such as gender, age, and avatar URL in the gender detection results. Note: Age is not an ID card-level accuracy, but an algorithmic estimate based on account public information (such as nickname, avatar, and interactive behavior). It can usually identify rough ranges such as “about 20 years old” and “about 30 years old”, which is enough for crowd stratification.

What is tgid? Why is exporting tgid important for TG operations?

tgid is the unique identifier of a Telegram user (similar to a phone number but more stable). Even if the other party changes their mobile phone number, the tgid will not change. If you need:

Continuously send targeted messages to specific users
Invite users to join communities or channels
Connect to TG Bot for automated operations

The exported tgid allows you to bypass the trouble of changing mobile phone numbers and achieve more accurate long-term operations. Remember to check the “Export tgid” field when filtering.

How to use the age field to filter TG users who are about 30 years old?

If the product or service you operate is aimed at working people (about 25-35 years old), you can do this:

Check “tg gender detection” in the screening task, and the system will return the age field.
The age field values in the exported data are such as “28”, “32”, “30–35”, etc. You can filter them as needed.
At the same time, use the “active in the past 30 days” condition to exclude accounts that have been inactive for a long time.

The list obtained in this way is of high quality - it has both age attributes and active users that can be reached in the near future. Note: The age results are for reference only and are not recommended as the sole basis for decision-making.

Filter features and applicable scenarios of WhatsApp, Line, and Zalo

In addition to Telegram, platforms targeting different markets must also be treated differently.

WhatsApp Screening Number: Activity Detection of Global Circulation Numbers

WhatsApp covers 200+ countries around the world and is the standard for international B2C promotion. Key points for screening:

Activation Test: Confirm whether the number is registered with WhatsApp.
Activity Window: Also supports 7 days, 30 days, etc. For marketing messages, it is recommended to select “7 days active”. This type of user is more likely to read the message.
Gender Screening: If the market differences are obvious (such as screening female users for the Indian market), they can be used in combination.

Note: WhatsApp has strict control over marketing activities. It is recommended to select a high-quality list first and then use a compliant sending method.

Line and Zalo screens: powerful tools for exploring the Southeast Asian market

Line: There are a large number of users in Thailand, Taiwan, Japan, and Indonesia. The Line uid can be exported when filtering, which can be used to add friends or send messages on Line later. For community operations, filtering out numbers that are “activated and of female gender” can improve conversions in fields such as beauty and fashion.
Zalo: Vietnam’s No. 1 national communication application, a must-use for local e-commerce and game promotion. Zalo screening focuses on activation and activity, and also supports gender recognition. If you have business in Vietnam, it is recommended to prioritize users who have “activated Zalo and been active in the past 7 days”.

How to choose the screening system? Analysis of key functions and billing models

There are many screening tools on the market, but you need to pay attention to these core capabilities:

Multi-platform support: It is best to cover mainstream platforms such as Telegram, WhatsApp, Line, Zalo, iMessage, RCS, etc., and each platform has complete detection types (activation, activity, gender, etc.).
Batch processing and deduplication: A single task supports millions of numbers, and cross-task deduplication is built-in to avoid repeated deductions.
Export field flexibility: Export fields (such as tgid, uid, gender, age, avatar URL) can be customized to meet different operational scenarios.
Billing model: The most flexible payment method is billing by item. There is no monthly subscription. You pay for what you use. The recharge method is preferably anonymous (such as USDT) to facilitate cross-border operations.
Task Notification: Notify via Telegram or email after completion, no need to stare at the page all the time.

Taking KK-DATA as an example, it fully meets the above standards: it supports 12+ platform screen numbers, 1 million items in a single task, has a data deduplication warehouse, charges per item (no subscription package), USDT recharge, and provides detailed documentation and console. Of course, you can also compare other products according to your own needs, but the above dimensions are indispensable.

Common mistakes in number screening and anti-fraud guide

Why can’t we detect the same number repeatedly?

A fee will be deducted for each test (billed per item). If your number library is cumulative, repeated detection is a waste. A good system (such as KK-DATA) will automatically remove duplicates, but you need to confirm whether the tool has this function - when importing a new list, the system should automatically compare historical tasks, and the results of already detected numbers will be directly reused without any deductions.

How to identify the real customer service of the platform?

There are many scams in the overseas industry that imitate customer service, especially on Telegram. Please remember:

The official customer service account will be publicized on the platform official website (such as kkdata.cc), or use the two-way contact robot (such as https://t.me/kkdata_robot）。
Do not believe anyone who takes the initiative to send you a private message or claims to be a customer service person requesting transfers or joining a group.
Recharge can only be done through the official website or the channels prompted by the console.

Other common errors

Only activation test, not activity: Although many numbers are registered, they have not logged in for months or even a year, so messages sent to them are likely to go nowhere.
Ignore Data Compliance: Do not filter or use number segments from prohibited countries and comply with local data protection regulations.
Importing too many numbers at one time: It is recommended to divide the number into batches, and each batch should be controlled within 100,000, which will make the detection faster and facilitate subsequent management.

FAQ

**Q: How long does it usually take to screen numbers? ** Answer: It depends on the number of numbers and the type of detection platform. A task with tens of thousands of items is usually completed within a few minutes to dozens of minutes. When the task is completed, the system will notify you through Telegram. The specific duration is subject to the console task status.

**Q: Is it possible to filter only numbers with “activated” status and not those with “unregistered” status? ** Answer: Yes. Almost all platforms (Telegram, WhatsApp, Line, etc.) support exporting the results of “activated/valid” status separately. You can check the required fields in the task configuration.

**Q: Do the filtered numbers contain personal information such as avatars and nicknames? ** Answer: The gender detection results of some platforms (such as Telegram) may include public fields such as avatar and nickname, but the specific field list exported from the console shall prevail. Please use it in compliance with local data protection regulations.

**Q: The balance will be deducted according to the item. What is the minimum recharge? ** Answer: The minimum recharge is about 50 USDT (TRC20), and the balance will be automatically credited after the recharge. Please see the real-time price of the console for details of the single price of different platforms and different detection types. There is no subscription package.

**Q: Can the generated random numbers be guaranteed to actually exist? ** Answer: The global number generation function only randomly combines numbers according to the number segment rules, and the generated numbers may not necessarily correspond to real users. A subsequent “activation test” is required to confirm whether the registration is valid. The generation itself is free, and the testing is billed on a per-item basis.

Number screening is not the icing on the cake, but a must-have for overseas customers. From number segment generation to multi-platform detection, to data deduplication and export, every step can help you save a lot of time and budget. If you are looking for a screening system with comprehensive functions, pay-as-you-go, and support for USDT recharge, you might as well try KK-DATA.

👉 Log in to the console to start filtering: https://app.kkdata.cc/ If you have any questions, you can contact the customer service robot in both directions: https://t.me/kkdata_robot Or check out the full documentation: https://docs.kkdata.cc/

Complete Guide to Number Screening: From Number Segment Generation to Available List (Telegram/WhatsApp Multi-Platform)

关于作者