Line valid number detection and deduplication: 3 steps to get accurate customer acquisition data

In overseas marketing, Line valid number is the core lever to leverage the conversion rate. Whether targeting the Taiwan, Japan, Thailand or Southeast Asian markets, Line is a social platform with over 200 million monthly active users. Whether its registration number is authentic, active, and gender-tagged directly determines the cost of private messaging and the efficiency of attracting new members to the community. Invalid numbers not only waste the recharge balance, but may also slow down the operation rhythm due to repeated detection.

This article will combine specific detection types and data deduplication solutions to present a complete path from number generation to exporting effective results, helping the team obtain the highest quality Line customer acquisition data at the lowest cost.

---

What is a valid Line number? Why is it important to acquire customers overseas?

The so-called valid Line number is not simply “can make calls”, but a number that has at least one of the following attributes on the Line platform:

• Activated: This mobile phone number has registered a Line account and can be searched or initiate chats;
• Recently active: The account has logged in or interacted within the specified time window;
• Gender tag: Line’s public fields or behavioral data can identify the user’s gender (male/female) to facilitate targeted push.

The costs caused by invalid data (empty accounts, unregistered accounts, zombie accounts) are very intuitive: assuming you deduct fees per item after recharging, every time an invalid number is detected, one charge is wasted; if invalid numbers are used for mass messaging, it will also lead to high unsubscription rates, account risk control and even bans. Therefore, screening valid Line numbers is the first step to reduce costs and increase efficiency, and is also the prerequisite for accurately acquiring customers.

---

How to check whether the Line number is valid? List of common detection types

Through a professional screening platform (such as KK-DATA), you can submit Line detection tasks for batch numbers and obtain the following core results. Different detection types correspond to different application scenarios.

Line activation detection: filter empty numbers to save first-round access costs

The activation test is the most basic verification: submit your mobile phone number, and the system will return whether the number has been registered for Line. If the number is not registered, all subsequent active detection and gender identification will be impossible.

Application Scenario: The first round of filtering for new recruits from the community. For example, if you have 100,000 Taiwanese mobile phone numbers, run an activation test first to filter out 60% of unregistered numbers, and then enter the next round of fine screening for the remaining 40,000 numbers.

Line activity detection and gender targeting: precise screening of high-converting groups

Activity helps determine the user’s recent usage status: a number that has logged in within 30 days is much more useful than one that has not logged in for half a year. The gender field is used for male/female targeted marketing. For example, beauty products are only promoted to women, and gaming products are targeted to men.

Application scenario: For private message notifications (such as coupons and new product launches), give priority to the number combination of “activated + active in the past 30 days + corresponding gender” to increase the response rate by 2-3 times.

Note: Gender detection is based on the Line platform’s public fields and user behavior data. It can be used for crowd targeting, but it cannot achieve ID card-level accuracy. It is recommended to use it in combination with fields such as activity level.

---

How to avoid repeated deductions when screening numbers in batches? The role of data deduplication warehouse

When filtering across tasks, the most easily overlooked hidden cost is duplicate detection. For example, Team A just tested the Line activation status of a certain batch of numbers yesterday, and today they submit the same batch for gender testing. The system will deduct fees again and queue them up again, which wastes balance and slows down progress.

KK-DATA’s built-in data deduplication warehouse independently maintains historical detection records for each account. When a new task is submitted, the system automatically compares the existing numbers, skips the detected items (only the detection fee of the new number will be deducted), and displays the deduplication results on the task details page. This means you don’t need to manually manage the number pool, all deduplication logic is automatically completed in the background.

---

Complete Line valid number screening and deduplication in 3 steps (from generation to export)

The following process connects number preparation, screening, deduplication and export, and can be directly used for daily customer acquisition work.

Step 1: Prepare Number Pool via Global Number Generation or CSV Import

You can use the “Global Number Generation” function in the console to select the number range of the target country (such as Thailand, Indonesia, Japan) and generate a random number with one click. This feature is completely free and does not consume your balance.

If you already have a customer list (such as a registered mobile phone number), you can directly upload a CSV or TXT file. Supported formats: One number per row, or a standard table with number columns.

Step 2: Submit Line screening task and enable deduplication warehouse

Create a new task in the console:

1. Select the detection platform → Line
2. Check the detection type: activated, active, gender (multiple choices available)
3. Upload the number file or paste the number list
4. Enable the “Deduplication Warehouse” switch (enabled by default)
5. Click “Submit Task” and the page will display the estimated cost (number of items × unit price, see the real-time price on the console for details)

After the task is submitted, it will enter the queue and the system will notify you through Telegram that the task is completed (it needs to be bound in the settings).

Step 3: Export Line valid numbers (including uid and other fields) on demand

After the task is completed, click “Export” on the task details page and select CSV or TXT format. Exported fields include:

-Mobile phone number

• Open status (yes/no)
• Activity (last login date or level)
• Gender (male/female/unknown)
• Line uid (unique user ID corresponding to each number)

After obtaining the data containing uid, you can import it into a third-party marketing tool or a system developed by yourself to achieve precise private messaging.

---

How do Line valid number detection results be applied to actual customer acquisition scenarios?

The test results are not a bunch of tables, but the basis for directly guiding operational actions. The following are three typical scenarios:

1. Community Attraction: Use an “activated” number to send a group invitation link to avoid wasting invitation quotas with invalid numbers.
2. Private message notification: Only send promotional information to numbers that have been “active in the past 30 days” to reduce the risk of being blocked and increase the open rate.
3. Female user targeting: Screen numbers with a gender of “female” and cooperate with the launch of maternal and infant, beauty and cosmetics products. The conversion rate can be more than 3 times that of the general population.

Each screening is not an isolated act. Store the deduplicated valid numbers in your own database, and then perform additional testing on the new numbers to form a closed loop of continuous rolling customer acquisition.

---

Frequently Asked Questions about Line Screening: Price, Speed and Data Accuracy

• Price: Billed by item, different unit prices are different for different detection types. No subscription packages, just pay for what you use. Please check the console or the official website billing page for the specific unit price.
• Speed: A single task supports up to about 1 million numbers. The processing time depends on the queue load, usually millions of tasks are completed within a few hours, and Telegram notifications can be received when completed.
• Accuracy: Activation detection is close to 100%; activity and gender recognition are based on the platform’s public data and algorithm model. There is no guarantee of 100% accuracy, but it is sufficient to meet the accuracy requirements of commercial customer acquisition.

---

FAQ

**Q: How long does it take for the Line valid number test to produce results? ** Answer: The detection speed depends on the number of submitted numbers and the current queue load. A maximum of approximately 1 million numbers can be submitted for a single task, and the system will notify you via Telegram upon completion.

**Q: What do I need to provide to detect a valid Line number? ** Answer: You only need to provide a list of mobile phone numbers to be tested (in CSV or TXT format). There is no need to provide Line account numbers, passwords or other private information. The detection process only verifies the registration and active status of the number on the Line platform.

**Q: What is the difference between Line valid number and Line uid? Can the filter number export uid? ** Answer: Line’s valid number refers to the mobile phone number confirmed to be available through testing; Line uid is the unique identifier assigned to the user by the Line platform. Use the KK-DATA filter number to export the uid field of the corresponding number to facilitate subsequent operational docking.

**Q: Can the deduplication warehouse be shared across users? ** Answer: The deduplication warehouse is maintained independently for each account, and the number libraries between different users are not visible to each other. Different tasks under the same account will be automatically compared and deduplicated to avoid repeated deductions.

**Q: How accurate is the gender detection rate of Line screening? ** Answer: Gender detection is based on the comprehensive judgment of the Line platform’s public fields and user behavior data. It can be used for targeted screening of people, but it cannot achieve ID card-level accuracy. It is recommended to be used in combination with fields such as activity level.

---

From number generation to deduplication export, the entire process can be completed within the KK-DATA Console. If you need assistance during operation, you can get immediate support at any time through Two-way Contact Customer Service https://t.me/kkdata_robot; for detailed operating documents, please refer to https://docs.kkdata.cc/.

👉 Log in to the console to start screening numbers Two-way contact customer service https://t.me/kkdata_robot