Complete guide to number screening services: from number generation to multi-platform activity detection, one article to get customers overseas

The overseas marketing team faces a core problem every day: after obtaining a batch of mobile phone numbers, which numbers are actually activated for Telegram? Which WhatsApp users are active recently? Which male users are suitable for targeted push? If you send messages blindly, it will not only be inefficient, but also prone to account bans and a waste of budget. Screening service was born to solve this pain point - it helps you batch verify the account status, activity and crowd attributes of numbers on multiple social platforms, making every contact more confident.

What is the screening service? Why is it needed for overseas marketing?

The core definition of the account screening service is simple: Batch detection of the account status, activity and crowd tags of mobile phone numbers on multiple social platforms (such as Telegram, WhatsApp, Line, Zalo). It is not a “universal detector”, but a set of configurable data cleaning tools - you import numbers, select the platform and dimensions to be tested (activated, active, gender, etc.), and the system returns a result set with fields.

Why is overseas marketing increasingly inseparable from it? Three key values:

• Reduce invalid reach: Before private message promotion or community operation, filter out unactivated and inactive numbers to avoid wasting sending quota and IP resources.
• Accurate group delivery: Use fields such as gender, age, active window, etc. to divide users into groups such as “highly active men” and “recently active women” to design targeted words.
• Clean data assets: Through the data deduplication warehouse, you can avoid repeated paid detection of the same number in multiple marketing tools. Long-term use can save 10%–30% of the cost of screening numbers.

Common application scenarios include: independent website sellers verify the validity of WhatsApp numbers and then send promotional cards; Telegram community operations screen users who are “open and active in the past 7 days” to make targeted group invitations; cross-border e-commerce teams detect Zalo active users for the Vietnamese market. There is a common requirement behind these scenarios - test first, then reach; clean first, then launch.

What platforms and detection dimensions does the screening service support?

The screening services on the market cover a wide range of platforms and detection dimensions. Before selecting, you need to have a clear understanding of what you can and cannot measure. The following takes the capability boundaries of a typical platform as an example (specific fields are subject to console export):

Platform	Common detection types	Typical business scenarios
Telegram	Activation detection, activity detection (window can be specified), gender/age field, tgid export	Community recruitment, Bot push, paid group filtering
WhatsApp	Activation verification, activity level judgment, gender field	Customer communication, promotional broadcast
Line	Activation/effective detection, gender identification (male/female), uid export	Customer acquisition in the East Asian market
Zalo	Open detection, activity, gender fields	Vietnam and Southeast Asia marketing
iOS/iMessage	iOS device/blue number detection, iMessage valid number	Precise delivery on iOS
Viber	Activation/Activity Detection	Eastern Europe, Middle East Market
Facebook/Instagram	Social account association detection	Social media advertising assistance

Telegram filter number: activation detection, active window and gender/age fields

Telegram filter is one of the most commonly used scenarios. You can first check tg activation (to determine whether the number is registered with Telegram), and then do tg activity detection on the activated number - the active window can be customized: last 24 hours, last 3 days, last 7 days, last 30 days. Numbers with higher activity levels usually have higher private message reply rates and group membership approval rates.

Something to note is the tg gender/age field. This part of the data comes from Telegram’s public information (personal information filled in by users themselves). The accuracy is not 100%, but it is very valuable as a reference dimension for crowd screening. For example, you can see the label “age about 30 years old” in the exported results, which is used to interpret that the user may be in the golden age of workplace consumption and is suitable for pushing financial and tool products. Don’t think of it as ID-level accuracy, but as a tool to assist grouping.

WhatsApp Screen Number: Activation Verification and Activity Judgment

WhatsApp detection focuses on verifying whether the number is activated, and some number screening services also support activity judgment (for example, whether the number has recent online records). For cross-border e-commerce and independent website sellers, first screening out activated WhatsApp numbers before sending marketing messages can significantly reduce the risk of account suspension. Some platforms also support exporting WhatsApp uid or wsid for subsequent integration with the CRM system.

Line, Zalo and other platforms: Screen numbers for Southeast Asia and multi-country scenarios

Line is the mainstream social tool in East Asia (Japan, Taiwan, Thailand), and Zalo has an absolute advantage in Vietnam. The screening values of these platforms are:

• Line Screen Number: Supports activation detection and gender recognition, can export uid, suitable for community operations in Thailand/Taiwan.
• Zalo Screener: For Vietnamese users, it provides activation, activity, and gender detection, which is a key link in localized marketing.
• iOS/iMessage: Detect whether the number is an iOS device or iMessage activated status, suitable for targeted reaching of Apple users.
• RCS/Viber: Covers some markets in Europe, America and the Middle East, and is suitable for multi-channel parallel customer acquisition strategies.

How to choose a reliable screening service?

When choosing a screening service, it is recommended to evaluate from the following four dimensions:

• Data volume support: What is the upper limit of the number of numbers that can be processed in a single task? Can it support millions of batches? How fast is the export after the task is completed?
• Target Platform Coverage: Are all platforms you want to use covered? Does it support simultaneous multi-platform detection (that is, one number detects TG and WA at the same time)?
• BUDGET MODE: Per-item billing or monthly subscription? Can I see the cost estimate before the assignment?
• Data Privacy and Compliance: Is the number transmitted encrypted after submission? Can the result data be downloaded locally? Is there a clear privacy policy?

Pay-as-you-go vs. monthly subscription: Which one is more suitable for your business volume?

In the pay-as-you-go billing mode, after recharging the balance, the fee will be deducted only after the task is completed. New tasks cannot be submitted when the balance is insufficient. This model is suitable for teams with large fluctuations in business volume or those that are just starting out - you pay for what you use, and there is no waste.

The monthly subscription system usually provides a fixed number of monthly packages, and additional charges or upgrades are required for excess amounts. This model is suitable for teams with stable and large business volume, but there is a risk of waste (the number of unused items this month is generally not accumulated to the next month).

Suggestion: If your team is new to screening, or the monthly detection volume is less than 100,000, give priority to billing by volume. When your business volume is stable and exceeds 500,000 in a single month, then evaluate whether there is a more cost-effective monthly subscription plan. Please refer to the real-time price of the console for the specific unit price. Don’t trust low-price promises from outside the platform.

Number generation and deduplication functions: efficiency points that are easily overlooked by small teams

Many teams only focus on the “number screening and deduction” link, but ignore two front-end efficiency tools: number generation and data deduplication.

• Number generation: Supports random generation of numbers in 240+ countries/regions, as well as number segment generation and custom CSV import. The generation is completely free and can be used as a number source for number screening tasks. For example, if you want to test the Telegram activation rate of a certain number range, you can first generate a batch of numbers for free and then filter the numbers.
• Data Deduplication Warehouse: Automatically remove duplicates across tasks to avoid multiple detections of the same number. If your team imports the same number library every week for testing on different platforms, the deduplication function can help you save 10%–20% of your balance.

Complete workflow of filter service: Generate → Filter → Export

A typical screening task consists of three steps:

1. Prepare number source: Upload an existing number CSV/TXT, or use the global number generation function to create a new number. The generation is free and supports customization by country, number segment, and quantity.
2. Submit screening task: Select the target platform (such as Telegram activation + activity detection) and detection type (activation, activity, gender, etc.) in the console, and the system will automatically display the estimated deduction amount. Submit the task after confirmation.
3. View and Export Results: After the task is completed, you can preview the results online or export a CSV/TXT file. The exported fields include number status identification, active timestamp, gender/age tag, platform uid, etc., which can be directly imported into CRM or sending tools.

Precautions and pitfall prevention guidelines when using the screening service

In actual use, there are the following points that require special attention:

• Balance Management: The estimated fee will be displayed before the task is submitted, but the final deduction is based on the actual number of detections (usually slightly less than the estimate because some numbers may be skipped due to format issues). It is recommended to check the deduction details in the task list and recharge regularly to avoid task backlog.
• Data Privacy: Do not pass your number list in plain text on public channels. Use HTTPS to upload, and clean the cloud records in a timely manner after exporting. The platform generally supports data desensitization viewing (such as hiding the middle four-digit number segment).
• Official customer service anti-fraud: Screening platforms are often targeted by fake customer service. Be sure to contact customer service through official channels (such as the Telegram ID listed in the product documentation), and do not take the initiative to add your “customer service account” easily.
• Batch Suggestions: The number of suggestions for a single task should be controlled within 1 million, and any excess suggestions will be submitted in batches to ensure that the task is completed within a reasonable time. At the same time, the time window of the detection results should be as unified as possible to avoid deviations in activity judgment due to too long intervals.

How to maximize the customer acquisition and conversion effect of the screening service?

Screening is not the end point, but a part of the customer acquisition process. To maximize conversion results, try the following strategies:

• Combined with data deduplication warehouse: If you have multiple batch number databases, clean them in the deduplication warehouse first to avoid repeated detection. This saves money while maintaining data uniqueness.
• Make good use of gender/age fields for segmentation: For example, push technology products to male users aged 25-35, and push beauty/lifestyle content to female users aged 18-25. The finer the segmentation, the higher the open rate and conversion rate.
• Build a closed loop from screening to reaching: After screening, import the results into automated tools (such as Bot or private messaging tools) for targeted reaching. It is recommended to test in small batches first (about 1,000 messages) to verify the speaking skills and sending frequency, and then expand to full push.
• Focus on active windows: Different industries have different definitions of “active”. Community operations may focus on “active in the past 7 days”, while promotional push can be relaxed to “active in the past 30 days”. Flexibly adjust the active window according to business needs to avoid missing potential customers.

Taking KK-DATA as an example, its console and customer service robot form a complete closed work loop: you can complete number generation, filtering, and export in the [Application Console] (https://app.kkdata.cc/), and at the same time obtain real-time support through [Two-way Contact Customer Service] (https://t.me/kkdata_robot). The entire process does not require switching between multiple tools, and data consistency is stronger.

FAQ

**Q: Are the numbers detected by the number screening service necessarily accurate? **

Answer: The detection results are affected by factors such as the status of the number itself and platform API feedback. The overall accuracy is high (usually more than 95%), but it cannot be 100%. For example, the status of a certain number recently changed from “active” to “inactive”, and there was a time difference in between. It is recommended to use the screen number results as a reference rather than as an absolute basis for judgment, especially when facing high-value users, and can be combined with manual verification.

**Q: Can the number screening service detect information such as the real name of the number or the binding of a bank card? **

Answer: No. The number screening service only detects the number’s registration status on social platforms, activity level, gender/age and other information in public information, and does not involve private data such as name, ID card, bank card, etc. Please do not confuse screen numbers with “identity verification” and “anti-fraud black products”. It only serves legitimate marketing customer acquisition scenarios.

**Q: Does the screening service support detecting multiple platforms at the same time? For example, a number can measure TG and WA at the same time? **

Answer: Some platforms support “multi-platform simultaneous detection”, that is, if you check multiple targets such as Telegram and WhatsApp in one task, the system will detect each number in turn and return the respective result fields. For specific support information, please refer to the task configuration page of the console. Note: The total cost of synchronous detection is equal to the sum of the unit prices of each platform, and the task time will also increase accordingly.

**Q: How to prevent number information from being leaked during the number screening process? **

Answer: Choose a platform with a clear privacy policy and confirm whether its data transmission uses HTTPS/TLS encryption. After the task is completed, it is recommended to immediately back up the results locally and clean up the temporary data in the cloud. At the same time, do not transmit the list containing complete numbers through non-encrypted channels (such as WeChat, regular mail).

**Q: How many numbers can be screened in a single task? **

Answer: Different platforms have different restrictions, generally at the million level. For example, a single task supports submission of less than 1 million items; more than one million items can be submitted in batches to avoid task timeout. The specific upper limit can be viewed on the console import page.

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After reading this guide, you should have a clear understanding of the overall picture of the number screening service. If you are about to start screening numbers, or want to improve the efficiency of your existing customer acquisition process, you can try it out now.

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

In addition, the official documentation provides more detailed platform detection instructions and best practices. It is recommended to save them for later use: https://docs.kkdata.cc/