From number generation to Line valid number verification: a complete overseas customer acquisition pipeline

For overseas teams focusing on the Southeast Asian market, Line is an unavoidable social platform. Users in Vietnam, Thailand, Taiwan and other regions use Line as their preferred tool for daily communication and business contacts. However, what really bothers marketers is not “whether to use Line”, but “how to efficiently obtain a batch of line valid numbers” - that is, those mobile phone numbers that have registered for Line, are active, and may match the target group’s profile. Blindly purchasing or randomly dialing numbers is not only costly, but also reduces the friend acceptance rate and customer service response rate due to a large number of invalid numbers.

This article will dismantle a complete pipeline for you starting from scratch: ** first generate a number pool to be verified, and then filter out the open, active, gendered Line valid numbers** through the platform, and directly export them for subsequent operations. The entire process does not require any subscription package, and payment is based on the actual detection volume. It is suitable for batch tasks of 1 to 1 million items.

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What is a valid Line number and why is it so important for acquiring customers overseas?

Line valid number refers to a mobile phone number that has been registered (activated) on the Line platform and can be added as a friend or receive messages under normal conditions. On this basis, you can further detect its active status (such as whether it has been online in the past 30 days) and gender/age and other attributes.

Why is the accurate Line valid number so important?

• Improve friend addition rate: Send friend requests to users who have opened Line. The pass rate is much higher than random dialing, and platform risk control will not be triggered.
• Reduce reach cost: Dial an invalid number once and it will waste a detection fee (even waste time and account resources when sending a group manually).
• Support targeting strategy: Through gender filtering, you can only retain male or female users; through active filtering, you can specify people who have been online in the past 7 days/30 days for promotional activities or community recruitment.

In the Vietnamese e-commerce scenario, a list that has been verified by Line with a valid number has a subsequent order conversion rate that is usually 3–5 times higher than that of an unverified list. This is where the value of “filter before” comes into play.

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Number generation - how to obtain the number pool to be verified in batches?

Without a number, how to verify? Number generation is the starting point of the pipeline. KK-DATA provides three free number generation methods, which you can choose flexibly according to your target market.

Common methods for global number generation

Methods	Applicable scenarios	Operation methods
Randomly generated	Covering all potential number segments in a certain country/region	Select a country (such as Vietnam, Thailand), set the quantity, and the system will randomly generate numbers
Number segment generation	Some known operators or region prefixes	Enter the number segment prefix (such as Vietnam starting with +84), and batch generate consecutive numbers in the number segment
CSV import	Already have your own number list but need to remove/supplement it	Upload the CSV file, the system will automatically recognize and import it as a candidate number pool

Random generation supports 240+ countries/regions, and number segment generation can be customized with prefixes. For example, if you want to focus on the Thai market, first try to generate 100,000 Thai random numbers, and then select the number segments with higher Line activation rates as the subsequent main pool.

It is free to generate, but the screen number will be charged per item.

It is important to note: The number generation module is free of charge. Only when your number list enters the “Line Valid Number Screening” task, the balance will be deducted based on the number of detections. This means:

• You can generate numbers an unlimited number of times and try again and again until you accumulate a satisfactory test pool.
• It is recommended to test the Line opening rate in the target country with a small random sample (for example, 1,000 lines) before officially screening numbers, and then submit the full number after evaluation.

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How to verify Line’s valid number? Detailed explanation of three-step operation

After having the number pool, enter the core link: filtering out the real line valid numbers. The entire process is completed within the KK-DATA console and requires no programming or complex configuration.

Step 1: Submit Line screening task

1. Log in to Application Console and enter the “Screen Number Task” module.
2. Select platform Line.
3. Upload the number list (supports CSV / TXT format), or directly select from the generated number pool.
4. Select the detection type: at least check Enable detection (that is, determine whether it is a Line registration number). If you need more granular operational data, you can check both Activity Detection (select the last 7 days/30 days/90 days) and Gender Detection (return male/female/unknown).
5. The system will automatically display the estimated deduction amount for this task (see the real-time price on the console for details). Submit after confirmation.

Step 2: Wait for the task to complete and receive notifications

After the task is submitted, it enters the queue for processing. A single task can process up to approximately 1 million numbers, with processing time depending on task size and current load. You can view the progress in real time on the console.

It is recommended that you bind Telegram notifications through Two-way Contact Customer Service. When the task is completed, the robot will automatically send a result reminder, so there is no need to stare at the page all the time.

Step 3: Export filtering results (CSV/TXT)

Once the task is completed, click the “Export” button and select CSV or TXT format. The exported file contains the following fields (the details are subject to the actual display on the console):

• Mobile phone number
• Line activation status (true / false)
• Line active status (e.g. last_active_days)
• Gender (male/female/unknown)
• Line UID (can be used for subsequent ongoing operations or API calls)

For example, you can directly filter out the records with “Line activation = true, gender = male, active in the past 30 days”, export them to CSV, and then import them into your CRM or mass messaging tool.

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What are the key detection dimensions for Line valid number verification?

Not only “whether it is activated”, Line filter number can also provide multi-dimensional attributes to help you make more precise targeting.

Detection Dimension	Return Field Example	Operational Value
Activated/valid	true / false	Determine whether the number belongs to a Line user and avoid sending requests to non-users
Activity	Online in the past 7 days / 30 days / 90 days	Filter recent active users for promotional activities and community recruitment
Gender	male / female / unknown	Targeted gender marketing (such as skin care products to promote women, games to promote men)
UID export	User unique identification	UID can be stored in its own database to achieve cross-task deduplication and long-term operation

Of particular note is the exported value of Line UID. Once you obtain a UID, even if your phone number changes later, you can still add friends or push messages through the UID (subject to Line usage regulations). This is more stable than pure numbers.

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Common scenarios and best practices for generation + verification pipelines

Combining number generation with Line valid number verification, here are the most common high ROI scenarios:

Scenario 1: Vietnam e-commerce team gathers groups

• Requirement: To promote Shopee or Lazada offers to Vietnamese users, you need to join the Line group.
• Operation: First generate 100,000 Vietnamese random numbers → filter Line activation + active (last 7 days) → export CSV, select about 15,000 valid numbers → add friends into groups and invite them to the group.
• Effect: Compared with directly purchasing an unfiltered number list, the friend passing rate increases from 5% to 30%, and the group activity doubles.

Scenario 2: Taiwan game promotion

• Requirement: Promote a certain mobile game, hoping to reach male players aged 20–35.
• Operation: Generate Taiwan number segment → filter Line activation + gender male + age field (about 20–35 years old) → export 5000 records → send the game download link through Line official account or friend request.
• Tips: The age field comes from the gender detection results, which is not ID card-level accuracy, but can be used for group portraits.

Scene 3: Follow the Thai customer service account

• Requirement: The local tourism business needs customer service Line accounts to add a large number of customers.
• Operation: Import the collected mobile phone numbers of Thai customers → Submit Line activation test → Keep only the activation numbers to avoid account restrictions caused by sending friend requests to non-users.
• Best Practice: Cooperate with the Data Deduplication Warehouse function to automatically remove detected numbers across tasks to avoid repeated deductions.

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Cost control and precautions for Line effective number assembly line

Advantages of billing by item: no subscription required, pay as you use

KK-DATA adopts the balance recharge + item deduction model, and there is no monthly or annual fee package. This means:

• Small teams can first deposit 50 USDT (the minimum threshold) and decide whether to continue after testing a few small tasks.
• Large tasks can be submitted in stages and fees will be deducted in batches. When the balance is insufficient, the task will be automatically suspended and there will be no overdraft.
• The unit prices for testing on different platforms (Telegram, WhatsApp, Line, etc.) are different, for details [see the official website billing page] (https://kkdata.cc/billing/).

Key points of cost control:

1. Test with samples first: Submit Line activation test of 500–1000 numbers and observe the activation rate. If it is less than 10%, it is recommended to change the number segment or country to avoid a large number of invalid detections.
2. Use the deduplication warehouse: Enable the “number deduplication” function in the console to avoid repeated deductions caused by repeatedly submitting the same number.
3. Choose the test type reasonably: If you only need the activation status, do not check activity and gender, because each test is billed separately.
4. Export in time after the task is completed: The results are only retained for a period of time to avoid re-detection due to data loss due to expiration.

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FAQ

**Q: How accurate is Line’s valid number detection? ** Answer: The detection is based on the Line platform interface and public protocol, and the activation/valid status accuracy is over 95%. Activity and gender fields are inferred data, suitable for group analysis, and are not guaranteed to be 100% accurate for each user. The specific accuracy rate is affected by the target country and number range.

**Q: Is there a limit to the free quota for generating numbers? ** Answer: No. The number generation function is completely free and there is no upper limit on the number of times or quantity. You can generate numbers for any country/region an unlimited number of times, and fees will be deducted only when you submit a number screening task.

**Q: What is the use of the exported Line UID? ** Answer: Line UID is the user’s unique identifier, which can be used to add friends or send messages later through the official API (subject to the Line platform usage policy). Storing UIDs in your CRM creates a stable connection that is not affected by phone number changes.

**Q: If this is my first time using it, how many items are recommended to start testing? ** Answer: It is recommended to recharge 50 USDT (minimum threshold) first, then generate 2000-5000 random numbers in the target country, and submit a Line activation test (about a few dollars). After observing the results, decide whether to increase the workload.

**Q: Are there big differences in Line activation rates in different countries or number segments? ** Answer: Very big. For example, the opening rate of rural number segments in Vietnam may be less than 20%, while the number segments of mainstream operators in Thailand can reach 40–60%. Through global number generation + small sample testing, you can quickly discover the “golden number segments” with high activation rates.

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Now you have mastered the complete method from number generation to Line valid number verification. This assembly line does not require any subscription and is paid based on actual usage. It is very suitable for overseas teams to gradually verify and accurately acquire customers.

👉Log in to the console to start screening numbers If you have any questions, you can communicate through the two-way customer service robot at any time: https://t.me/kkdata_robot

For more documentation and usage tips, please refer to KK-DATA usage documentation.