Line Valid Number Detection Guide: Use Google/Bing data to screen real and active Line users

In acquiring customers overseas in Southeast Asia, Line valid numbers are the core resource for reaching markets such as Vietnam, Thailand, Myanmar, and Taiwan. Different from ordinary mobile phone numbers, a valid Line number not only means that the number has been registered with Line, but also means that the account is active and can receive messages. For B2C e-commerce, game promotion, and community operations, obtaining and verifying valid Line numbers in batches can directly reduce the cost of invalid private messages and increase ROI.

This article will explain how to initially collect potential numbers through Google/Bing search, then use professional screening tools (such as KK-DATA) to detect Line valid numbers, and finally export user data suitable for male/female targeted marketing. The full text focuses on search engine search techniques and filtering practices, with practical content and no empty talk.

What is a valid Line number? Why is it more important than a regular mobile phone number?

Line valid number refers to a mobile phone number that meets two conditions at the same time:

• ✅ Registered and opened a Line account (i.e. “opened” status)
• ✅ The account has been active recently and can receive messages (i.e. “active” status)

Ordinary mobile phone numbers may not have Line installed, may have been logged out, or may have been blocked. Directly using such numbers to send private messages not only wastes the message quota, but may also affect the account reputation by sending invalid content. In markets with high Line penetration such as Vietnam and Thailand, using verified Line valid numbers can increase the private message pass rate and conversion rate by 3-5 times.

In addition, Line Screen can also provide auxiliary fields such as gender and age (inferred based on user public information) to help marketers develop differentiated strategies for male/female users. For example: male users are suitable for game promotion, and female users are suitable for beauty e-commerce.

How to initially obtain Line user’s mobile phone number through Google/Bing search?

Search engines are a starting point for low-cost access to a pool of potential numbers. Using the advanced search syntax and regional filtering options of Google and Bing, you can quickly collect mobile phone numbers or Line ID information from public pages.

Google/Bing search skills: area code segment + Line ID combination

The following search expressions can help narrow down the scope:

• "+84" "Line" "số điện thoại" (Vietnamese: phone number)
• "Line ID" "09" (Vietnamese numbers often start with 09)
• site:facebook.com "Line" "手机号" (grabbed from Facebook public information)
• site:shopee.vn "Line" (contact information on e-commerce page)

In Bing, results can be further filtered using regional filters (such as setting the region to “Vietnam” or “Thailand”). Google’s “site:” and “file type:” can also assist in positioning.

Example Search (Copy to Google or Bing):

site:facebook.com "Line" "+84" "mobile"

It is recommended to save the collected numbers as CSV or TXT text, with one number per line, including the international area code (such as +84912345678).

Why can’t the collected numbers be used directly?

There are three major risks in data crawled by search engines:

1. Expired: The number on the page may have been deactivated or the user has changed.
2. Line not registered: This mobile phone number does not have the Line application installed.
3. Flagned: Repeated use of the same number in large numbers may result in Line account being restricted.

Therefore, numbers collected by search engines must undergo secondary verification before they can be put into marketing. This officially introduces the key to professional screening tools.

How to detect valid Line numbers in batches? (step by step operation)

Take KK-DATA as an example to demonstrate the complete process from number import to result export. KK-DATA supports Line activation, activity, and gender detection. The upper limit of a single task is about 1 million. It is billed on a per-item basis and there is no subscription package.

Step 1: Prepare number list (CSV/TXT format)

• One number per line, which must include the international dialing code (e.g. +84, +66).
• The source can be search engine results, own customer database, or directly create a number pool using KK-DATA’s Global Number Generation Module (randomly generated in 240+ countries).
• Format example: +84912345678

Step 2: Create Line screening task in the console

1. Log in to Application Console.
2. Select “Screen Task” → “New Task”.
3. Upload the number file or paste the number text.
4. Select detection type:
   • Line activation detection: Only verify whether the number is registered with Line.
   • Line activity + gender detection: additionally detect recent activity status and identify gender (including age and other fields).
5. Set the task name and click Submit. The system will display the estimated fee (you cannot submit if you have insufficient balance).

Step 3: View task results and export

After the task is completed, the results list contains the following core fields:

Field	Meaning
Number	Original mobile phone number (including area code)
Activation	Whether to register Line (Y/N)
Valid	Whether the message can be received (Y/N)
Gender	Male/Female/Unknown (inferred based on public information)
Age	Approximate age group (such as 20-30)
uid	Line user’s unique identifier (can be used to add friends)

After exporting to CSV or TXT, you can filter out Line valid numbers based on “valid=Y” and then use them in conjunction with the gender field for targeting.

What is the difference between “activated” and “valid” in the test results?

These two terms are often confused, and understanding the differences is critical to subsequent operations:

• Activated: Indicates that the mobile phone number has successfully registered a Line account. However, there is no guarantee whether the account is currently online or able to receive messages.
• Valid: Indicates that the account has been active recently (for example, within 30 days) and can receive and read messages.

Marketing Suggestion: Give priority to using numbers with “valid” = Y, because the reach rate of private messages is higher. If you only need to verify the registration status (such as for whitelisting), use the “Activate” field.

How does the gender group detected by Line’s valid number help accurately acquire customers?

When using “Line Active + Gender Detection”, the system returns gender (male/female) and age range. These data are inferred based on public information such as the user’s Line avatar, nickname, personal profile, etc., and are not 100% accurate, nor do they involve ID card level verification. But in large-scale screening, it can be used as a directional reference.

Actual application scenario:

• Taking the game overseas: filtering “male + valid” numbers to promote competitive games.
• Beauty e-commerce: filter “female + valid” numbers and send promotional information.
• Financial management: You can further narrow the scope by combining the age field (such as 25-45 years old).

Note: The accuracy of the gender field depends on the completeness of the user’s public information, and the console will mark the “inferred” nature. It is recommended to test in small batches first and observe the conversion effect before increasing the volume.

Common misunderstandings and best practices of Line valid number detection

Through long-term service overseas teams, the following misunderstandings are more common:

Myths	Consequences	Best Practices
Ignore the number format (missing area code)	The system cannot recognize it and the detection fails	Be sure to retain the international area code, such as +84, +66
Detecting too many numbers at one time without deduplication	Repeated deductions, wasting balance	Use KK-DATA’s data deduplication warehouse to automatically deduplicate across tasks
Use search engine numbers directly	Most of them are invalid and invalid messages are wasted	Screen numbers first and then market, small-scale testing
Misunderstanding gender field accuracy	Over-reliance leads to directional bias	Use gender as a reference and combine with other dimensions

Operation suggestions:

1. First test 1,000 numbers to check activation and efficiency, and evaluate data quality.
2. Establish number pools for different markets (Vietnam, Thailand, Myanmar), and use the global number generation module to supplement the number segments.
3. Regularly use the deduplication warehouse to clean up the detected numbers to avoid repeated consumption.

How to combine with the global number generation module to improve the efficiency of obtaining effective Line numbers?

KK-DATA’s global number generation function (covering 240+ countries/regions) can be seamlessly connected with Line screening numbers to form a “generate → filter → export” pipeline. Specific operations:

1. Generate Number: Select “Number Generation” on the console, enter the target country (such as Vietnam +84, Thailand +66) and number range (such as 09, 08), and the system will randomly generate a compliant number.
2. Import screen number: Directly input the generated number file as the screen number task and select the Line detection type.
3. Export valid numbers: After filtering numbers, export the list of “valid=Y” numbers for private messages or adding friends.

This process saves the time-consuming manual search and is especially suitable for studios or agency operations teams that need to expand quickly but lack public account sources. The generation process is free, screen numbers are billed on a per-item basis, and the cost is controllable.

FAQ

**Q: After Line valid number detection, does the exported data contain uid? ** Answer: Yes. In the Line screening task, after selecting the “activated/valid” or “active + gender” detection type, the results usually include the uid field (the unique identifier of the Line user), which can be used to add friends in batches or push private messages later. The specific fields are subject to the console export file.

**Q: How much does it cost to detect a valid Line number? ** Answer: Billing is per item, and the unit prices for different detection types (activated only, activated + active + gender) are different. Please log in to the console https://app.kkdata.cc/ to view real-time prices; the estimated cost will be displayed before submitting the task.

**Q: Can I use the mobile phone number searched on Google for direct line marketing? ** Answer: Not recommended. The number crawled by the search engine may have expired, not registered with Line, or the user may have changed the number. Your Line registration status and activity must be verified through professional screening tools before you can enter the marketing process.

**Q: How many valid Line numbers can be detected at a time? ** Answer: The upper limit for a single task is approximately 1 million numbers. It is recommended to conduct testing in batches according to the target market, and use the data deduplication warehouse to avoid repeated testing of the same number and save balance.

**Q: How accurate is the gender data of Line’s valid number detection? ** Answer: Gender recognition is inferred based on the user’s public information (such as avatar, nickname, personal profile), is not 100% accurate, and does not involve ID card level verification. It is recommended to use gender as a reference for orientation and not to rely entirely on it.

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After reading this guide, if you want to quickly verify the valid Line number and export accurate user data, you can start now.

👉Log in to the console Create your first filtering task Two-way contact customer service https://t.me/kkdata_robot to obtain operation guidance For more documentation, please visit https://docs.kkdata.cc/