Complete tutorial on batch verification of valid Line numbers: How to efficiently screen accurate users

In overseas marketing, Line valid number (a mobile phone number that has registered Line and is in a state to receive messages) is a key asset to reach users in Southeast Asia, Japan, Taiwan and other regions. Compared with unregistered or canceled invalid numbers, the follower approval rate and message opening rate of valid numbers can be increased by 3 to 5 times, and at the same time, the risk of account risk control caused by harassment is significantly reduced. This tutorial will teach you step by step how to batch verify valid Line numbers, from data preparation to result export, to obtain an accurate user list in one step.

What is a valid Line number? Why is it more valuable than a regular number?

Line valid number means that the mobile phone number has been registered on the Line platform and is in a normal usable state (not blocked or canceled). This type of number can be directly used for marketing actions such as sending friend requests, joining groups, receiving advertising notifications, etc. Invalid numbers include numbers that have not been registered with Line, have been logged out, have been restricted from logging in, or have been banned by the platform.

Valid numbers vs invalid numbers: Impact on marketing effectiveness

Compare items	Use valid numbers	Mix in invalid numbers
Friend request pass rate	60%~80%	10%~20%
Message open rate	40%~55%	5%~10%
Account risk control risk	Low (due to many real user interactions)	High (a large number of failed requests can easily trigger account bans)
Single marketing cost	Pay according to the number of valid messages, the cost is controllable	A lot of waste on invalid numbers

In practice, many teams directly purchase “million-level number packages”, but a large number of the numbers are down, empty or unregistered. As a result, the failure rate for adding followers is extremely high, and accounts are also restricted due to frequent requests. Therefore, batch verification of valid Line numbers is the first step to acquire customers overseas and is also the key to cost optimization.

Common application scenarios for valid numbers

• Private message promotion: Send marketing messages in batches to valid numbers (must be used in compliance to avoid excessive harassment)
• Group Invitation: Invite valid users to the product group with the help of Line group function
• E-commerce notification: Notify of promotions and order status updates
• Game New: Send game trial invitations to valid numbers
• User Survey: Send questionnaire links to valid users to obtain real feedback

In short, the verified valid number is the basis of precision marketing and can greatly increase ROI.

Why do we need to verify valid Line numbers in batches?

Many overseas teams are still verifying manually: sending a friend request to each number and waiting a few hours to see if it is approved. There are three major pain points:

1. Extremely low efficiency: It takes a whole day to manually verify hundreds of numbers, let alone 10,000 numbers.
2. Easy to block accounts: If you send requests to a large number of unregistered numbers in a short period of time, the platform will determine it as a robot behavior and ban the account.
3. High cost: Each message sent may consume data packets or account reputation. The more invalid numbers, the greater the loss.

Batch verification tools (such as KK-DATA) specifically solve these problems: import tens of thousands of numbers at a time, automatically detect the Line registration status, activity, gender and other information of each number, and output the results within a few minutes. There is no need to log in to your Line account, and there is no need to worry about the risk of account suspension.

How to verify valid Line numbers in batches? Step-by-step guide

The following takes the KK-DATA platform as an example to show the complete batch verification process. The platform supports Line activation detection, activity detection, gender recognition and other functions, and supports pay-per-item and no-subscription packages.

Step 1: Prepare/generate a list of numbers to be detected

You have two ways to get the number:

Method 1: Import your own number list If you already have a CSV or TXT file of the target user’s mobile phone number, just upload it directly. It is recommended that the number format be international format (such as +8613800138000) or pure numbers (8613800138000), and the platform will automatically parse the country code.

Method 2: Use the global number generation function (free) KK-DATA provides random number generation and number segment generation functions for 240+ countries/regions around the world. This function is completely free. You can specify the country, number range, and number of numbers to quickly generate a list to be verified. Submit the screening task directly after generation, and only charge for the actual number of detected items.

Step 2: Create a Line filter task in the KK-DATA console

1. Login to the console: Visit https://app.kkdata.cc/ and register/log in.
2. New Screen Number Task: Click “New Task” and select the platform as Line.
3. Select detection type: You can check one or more of the following (specific fields are subject to console export):
   • Activation detection: Determine whether the number has been registered for Line (basic required).
   • Activity Detection: Identify the range of recent active days (such as the last 7 days, the last 30 days, etc.).
   • Gender Detection: Returns the user’s gender (male/female) and age fields (can be used to filter people around 30 years old, etc.).
4. Upload number: Paste text or upload CSV/TXT file, supports up to about 1 million items.
5. Check the estimated cost: The system will display the estimated total cost before submission (billing per item, please see the real-time price on the console for specific unit prices).
6. Submit task: Submit after confirmation, and the platform will start automatic detection. After completion, you will be notified via Telegram (need to be bound first).

Step 3: Export the filtering results and analyze them

After the task is completed, the result file (CSV or TXT format) can be downloaded on the task details page. Key fields include:

• Number: Original mobile phone number
• line_valid: Is it valid (1=valid, 0=invalid)
• line_active: activity level (such as active in the last 7 days)
• line_gender: Gender (male/female/unknown)
• line_age: age (numeric value)
• line_uid: Line user’s unique identifier (can be used for subsequent API docking)

You can use Excel or data processing scripts to further filter, for example: only retain numbers that are “valid + active in the last 30 days + male” for targeted promotion of male users.

After batch verification of valid Line numbers, how to use this data?

After getting the verification results, you can do the following processing based on the business scenario:

• Group Marketing: Group groups according to gender, activity level, country and other dimensions, and send different content respectively.
• Import automated marketing tools: Import valid numbers and UIDs into your existing CRM or message push system (such as Telegram Bot, WhatsApp API, etc.) to achieve automatic reach.
• Cross-validation: Valid Line numbers can be verified simultaneously on Telegram, WhatsApp and other platforms (KK-DATA supports cross-platform screening and multi-platform detection in one task) to build multi-platform user portraits.
• Data Deduplication: Use the platform’s data deduplication warehouse function to avoid repeated detection of the same number and waste of balances.

Line Frequently Asked Questions and Precautions for Valid Number Verification

How accurate are the test results?

KK-DATA adopts official protocol verification, and the misjudgment rate is extremely low (less than 1%). It is recommended to test a small number of numbers (100~200) first, and then verify on a large scale after confirming that the results are in line with expectations.

Can I verify numbers from multiple platforms at the same time?

Can. When creating a screening task, you can select multiple platforms (such as detecting Telegram, WhatsApp, and Line at the same time), upload the number once, and detect multiple platforms together, and the results will be output separately. In this way, valid numbers for multiple platforms can be obtained at one time, which is suitable for customer acquisition scenarios across the entire network.

What are the possible reasons for verification failure?

• Number format error: The country code is missing and the number digits are incorrect.
• Regional restrictions: Line registration rates in some countries/regions are low (such as some African countries), resulting in a low effective ratio.
• The number has been canceled or blocked: The platform will return an invalid status.

How to avoid repeated deductions?

Before submitting a task, it is recommended to use the platform’s Data Deduplication Warehouse function to compare this number with historical detected numbers and remove duplicates. This saves the remaining balance because one fee is deducted for each test.

Best practice for batch verification of valid Line numbers

1. Deduplicate first, then verify: Use the data deduplication warehouse to avoid repeated detection of the same number and save costs.
2. Submit in batches: The upper limit for a single task is about 1 million. If the number is large, it is recommended to split it into multiple tasks and submit them in batches to facilitate management and subsequent analysis.
3. Prioritize the “activation + activity” dual detection: The activation detection only confirms whether you are registered, while the activity detection can screen out users who have logged in recently. Such users have a higher success rate in adding followers.
4. Bind Telegram notification: You will receive a notification after the task is completed, no need to refresh the page all the time.
5. Use USDT to recharge anonymously: KK-DATA supports USDT (TRC20) recharge, the minimum is about 50 USDT, there is no subscription package, you pay what you use.

FAQ

**Q: What is a valid Line number? ** Answer: A valid Line number refers to a mobile phone number that has been registered on the Line platform and is normally available. This type of number can normally receive friend requests or messages and is the basis for precision marketing. The opposite is an invalid number that is unregistered, canceled or blocked.

**Q: What information is needed to verify valid Line numbers in batches? ** Answer: You only need to provide a list of mobile phone numbers to be verified (supports CSV/TXT format), no account password or verification code is required. The platform automatically detects the Line registration status of each number and does not trigger the other party’s privacy permissions.

**Q: What is the price for batch verification of valid Line numbers? ** Answer: Verification fees are charged on a per-item basis, and the unit prices for different detection types (activated only, activated + active, activated + active + gender) are different. For specific prices, please log in to the console https://app.kkdata.cc/ or check the official website billing page https://kkdata.cc/billing/. The estimated total cost will be displayed before submitting the task.

**Q: How accurate are the verification results? Can I export Line UID? ** Answer: The platform uses official protocols for verification, with an accuracy rate of over 99%. The export results include Line UID, gender, age and other fields (specific fields are subject to console export), which facilitates you to build user portraits.

---

Start batch verification of valid Line numbers now! No need to subscribe or pay per item, just fill in the number to create the task.
👉 Log in to the console to start screening numbers 💬 Two-way customer service Telegram

For more information, please visit the official website https://kkdata.cc/ or consult the usage documentation https://docs.kkdata.cc/.