Complete Guide to Number Verification Services: 10 Q&As for Screening Operations (2025 Edition)

In overseas customer acquisition, community management, and direct message marketing, number screening (validity detection) is a key step to improving ROI. “Number Verification Service” (often called “Cattle Data” in the industry) refers to number validation services covering Telegram screening, WhatsApp detection, iMessage/RCS identification, and more. Faced with platforms like 007data and thdata, many operators often hesitate: Which is more cost-effective? How to avoid pitfalls?

This article takes 10 frequently asked questions as the main thread, linking core scenarios of number screening operations: from what is a number verification service, comparison of platforms, to details of Telegram/WhatsApp detection, balance recharge pitfalls, and anti-fraud guidelines. The content is based on the real capabilities of KK-DATA (https://kkdata.cc/), while objectively comparing common industry options to help you make decisions quickly.

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1. What is a Number Verification Service? Core Functions & Applicable Scenarios

“Number Verification Service” (also known as “Cattle Data”) in the industry usually refers to batch number validation services—just like a cow producing milk, it continuously provides usable, active social account data. Such platforms help marketers filter out target users who are truly registered, recently active, or even gender-matched from large numbers, avoiding the risk of account bans caused by blind mass messaging.

Taking KK-DATA as an example, its core capabilities cover:

• Multi-platform screening: Telegram (registered/valid/active/gender/tgid export), WhatsApp (valid/wsid export), iMessage (Apple device identification), RCS (carrier detection), etc.
• Global number generation: Random generation of number segments in 240+ countries/regions, support importing custom CSV, generation is free.
• Data deduplication warehouse: Automatic cross-task deduplication, avoiding wasted balance from repeated detection of the same number.
• Per-record billing: No subscription plans, after recharging balance, charges are deducted based on actual detection count (estimated cost shown before task).
• USDT anonymous recharge: Minimum about 50 USDT (TRC20), balance updated automatically upon arrival.
• Multi-format export: CSV, TXT, each line containing number + detection result.

Applicable scenarios include: Telegram/WhatsApp mass promotion, overseas independent site customer acquisition, cross-border e-commerce client cleaning, batch verification for agency operations, etc. Whether you are new to number screening or switching platforms for lower costs, understanding the underlying logic of number verification services can save you trouble.

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2. Comparison Between Number Verification Services (KK-DATA, 007data, thdata, etc.): Which Should I Choose?

There are many similar platforms on the market: 007data, thdata, and KK-DATA, etc. They have similar functions but differ in detection dimensions, billing methods, and after-sales support. The table below is compiled based on public information to help you compare quickly (prices may change at any time, please refer to each platform’s official website for the latest information).

Comparison Dimension	KK-DATA	007data / thdata (example)
Detection platforms	Telegram, WhatsApp, iMessage, RCS	Similar coverage, may lack iMessage or RCS
Telegram activity window	7/15/30 days optional	Usually only “active or not”, no fine window
Gender identification	AI-based avatar recognition	Some platforms do not support or have low accuracy
tgid/wsid export	Supported	Some require additional payment
Billing model	No subscription, per-record deduction, estimated cost shown before task	Often package-based (monthly/yearly), may waste balance
Recharge method	USDT (TRC20) anonymous	Most support USDT, a few only accept credit card
Data deduplication warehouse	Automatic cross-task deduplication	Most do not have this feature, need manual handling
Export format	CSV, TXT	Similar
Customer service channel	Official Telegram @kkdata_cc	Each has official customer service, beware of counterfeits
Number generation	Free generation for 240+ countries, supports CSV import	Some charge

2.1 Detection Dimension & Accuracy Comparison

• Telegram activity: KK-DATA offers three windows: 7 days, 15 days, 30 days, more flexible; other platforms often only mark “last seen”, unable to fine-select.
• Gender identification: Based on avatar AI, accuracy about 70%-85% (depends on avatar quality), used for preliminary filtering. Platforms like 007data may not have this feature.
• wsid export: WhatsApp’s wsid (user unique ID) can be used for precise targeting later; KK-DATA supports export; some platforms require additional purchase.

2.2 Billing Transparency & Balance Management

KK-DATA’s no-subscription model means: Pay as you go, no wasted packages. After recharge, the balance is valid for a long time, deduction occurs only after task completion. 007data and thdata often use monthly/yearly plans, which can lead to fund lock-in if monthly detection volume is unstable. It is recommended that beginners first top up a small amount for testing, then decide on long-term use.

2.3 After-Sales & Anti-Fraud

KK-DATA’s official customer service is only available via @kkdata_cc (Telegram). 007data and thdata also have official channels. Scammers often impersonate platform customer service, actively sending you private messages offering “internal discounts” or “top-up services”. Do not trust any such messages. Always verify through the official website (https://kkdata.cc/) and the information at the bottom of the console.

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3. The 6 Most Common Questions in Telegram Number Screening (with Operation Steps)

Below are the top 6 frequently asked questions about Telegram number screening, each corresponding to actual operational pain points.

3.1 How to check if a Telegram number is actually registered?

Answer: Use “Registration Detection”. In the KK-DATA console (https://app.kkdata.cc/), create a new task, select the “Telegram Registration” type, upload the number list, and the system will return whether each number has registered Telegram. Registration detection is the most basic filter to eliminate unregistered numbers.

3.2 What do the 7-day/30-day activity windows mean?

Answer: They refer to the last online time being within 7 days/15 days/30 days. KK-DATA can determine if a number is active based on Telegram’s public status (last seen). 7-day active is suitable for immediate marketing mass messaging; 30-day active is suitable for users who haven’t been online for a long time, for reactivation purposes. Note: Detection results depend on user privacy settings (if set to “Nobody”, it cannot be determined).

3.3 Is gender identification accurate? How to use it?

Answer: Accuracy is about 70%–85%, based on AI recognition of the number’s Telegram avatar. Usage: Check “Gender Analysis” in the screening task, results will return “Male/Female/Unknown”. It is recommended to use it only as a screening reference, not 100% dependency. If precise gender is needed, combine with other data sources.

3.4 What is the use of tgid export?

Answer: tgid is Telegram’s internal unique user ID. After exporting tgid, you can send messages to that user directly via API, unaffected by number changes. For user pools that need long-term maintenance, tgid is more stable than phone numbers.

3.5 Why does it show “Registered” but messages are rejected?

Answer: “Registered” only means the number has registered Telegram, but the other party may have set privacy permissions (e.g., “Do not allow messages from non-contacts”), or the account may be banned/frozen. KK-DATA’s “Valid” detection can further verify whether the number can receive messages (by simulating sending detection), but not all rate plans include this feature. If needed, confirm before submitting.

3.6 How to batch export screening results?

Answer: After the task completes, download CSV or TXT files from the console. Each line contains the number, detection result (registered/valid/activity level/gender/tgid, etc.). CSV format is recommended for easy import into CRM or bulk messaging tools.

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4. WhatsApp Screening & iMessage/RCS Detection: Differences & Choices

Besides Telegram, WhatsApp, iMessage, and RCS are also important channels for overseas customer acquisition. Choose based on your target market:

• WhatsApp: Over 2 billion global users, suitable for Latin America, Southeast Asia, and European markets. Detection types include “Valid” (whether the number has registered WhatsApp) and “wsid export”. Valid detection is enough for adding friends or mass messaging.
• iMessage: Only for Apple device users, suitable for regions with high Apple penetration like Europe, the US, and Japan. Detection results tell you if the number is linked to an Apple ID and can receive iMessage.
• RCS: Rich Communication Services launched by overseas carriers, similar to iMessage but compatible with Android. RCS detection can determine if the number supports RCS and the carrier, suitable for SMS marketing scenarios requiring precise targeting.

Your selection criteria: Target users’ device habits + local carrier policies. For example, WhatsApp dominates in India; iMessage is more common in Japan. KK-DATA supports all four detection types, allowing you to mix them in the same task.

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5. Global Number Generation: Free But Be Aware of These Pitfalls

KK-DATA provides random number generation for 240+ countries/regions, including segment generation and custom CSV import. Generation itself is free.

5.1 Can generated numbers be used directly to add friends?

Answer: No. Randomly generated numbers are mostly invalid or unregistered. The correct workflow: Generate → Screen (Telegram/WhatsApp registration detection) → Export only valid numbers. Recommended pipeline: Check “Auto-screen after generation” in the task to complete in one go.

5.2 How to avoid wasting balance on duplicate numbers?

Answer: Use the data deduplication warehouse. KK-DATA automatically records all previously detected numbers, and filters them automatically on subsequent submissions, avoiding repeated charges. Additionally, you can import an existing number list before generation; the system will compare and deduplicate first.

Compared to 007data and thdata, KK-DATA’s deduplication mechanism is more thorough: cross-task deduplication, support for manual black/whitelists.

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6. Balance & Recharge: USDT Anonymous Payment, Pay as You Go

Core Principles:

• No subscription: No need to purchase packages in advance; balance is valid long-term (no expiry).
• Per-record deduction: Charges are deducted only after each screening task is completed; estimated cost is shown before the task; insufficient balance prevents submission.
• Recharge threshold: Minimum about 50 USDT (currently ~350 RMB), balance updates automatically upon arrival.
• Refund policy: Balance is not refundable, so it’s recommended to test with a small amount first, then top up heavily after confirming effectiveness.

Common Q&A:

• Does balance expire? No.
• Can I mix payment methods? USDT only.
• How to check balance? Displayed on the console homepage.

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7. Data Export Practical Tips: CSV, TXT & Downstream Tool Integration

After screening, exports are typically CSV or TXT. CSV is recommended because fields are clear: each line includes “number, detection result, tgid, wsid, gender, active days”, etc.

Integration Tips:

• Import into CRM (e.g., HubSpot, LingYi): Map fields “Phone Number” and “Tags”.
• Import into bulk messaging tools (e.g., UltraMsg, Whatsender): Ensure number format is international format (+86 138xxxx).
• Import into deduplication tools: If downstream also needs deduplication, use Excel formulas or Python scripts for secondary cleaning.

Note: The number of fields in the exported result depends on the screening type you selected. For example, if only “Registration Detection” is done, it will not include activity data. Please check as needed.

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8. Anti-Fraud & Official Verification: How to Avoid Fake Customer Service?

This is perhaps the most easily overlooked but most consequential aspect. Scammers impersonate platform customer service, claiming “internal discounts” or “discount top-ups” to trick you into transferring money.

Only Official Channels:

• Website: https://kkdata.cc/
• Application Console: https://app.kkdata.cc/
• Customer Service Telegram: @kkdata_cc (https://t.me/kkdata_cc)
• Official Channel: https://t.me/kkdata_channel (for updates and case studies)
• Business Cooperation: https://t.me/kkdata_bs

Three Anti-Fraud Principles:

1. Only fill in information on the official website, do not click third-party links.
2. Any “customer service” who proactively sends you a private message is fake; report immediately.
3. Before transferring money, verify that the Telegram account matches the official website. If someone claims to be 007data or thdata customer service, also verify through their official websites.

Remember: Legitimate platforms will not proactively add you on WeChat or require transfers to personal accounts.

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Frequently Asked Questions

Q: Which is better: Number Verification Service (Cattle Data), 007data, or thdata? A: It depends on specific needs: if you care about price transparency and per-record payment, choose KK-DATA (no subscription, pay-as-you-go); if you need fixed-budget packages, consider other platforms. It’s recommended to first run small-scale tests to compare activity windows, deduplication features, and customer service responsiveness.

Q: Telegram number detection shows “Registered” but messages are rejected. Why? A: “Registered” only means the number has registered Telegram, but the other party may have set privacy restrictions or the account may be banned. KK-DATA’s “Valid” detection can further verify whether the number can receive messages (note: not all rate plans support this feature).

Q: Can recharged USDT be refunded? Does the balance expire? A: Balance is non-refundable but is long-term valid (does not expire). If you stop using it, it’s recommended to recharge only what you need to avoid idle funds.

Q: How long does it take to generate 1 million numbers? What about screening? A: Number generation is free and very fast (a few seconds to a few minutes); screening time depends on data volume, platform, and concurrent tasks. Typically, hundreds of thousands of records can be processed in minutes to tens of minutes; see task progress for specifics.

Q: How can I ensure I’m contacting official customer service? A: Official customer service Telegram is only @kkdata_cc (see website https://kkdata.cc/ and bottom of console). Any “customer service” who proactively messages you is fake; do not provide account passwords or transfer money.

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Action Guide

For operators new to number verification services, the recommended process is:

1. Visit the console (https://app.kkdata.cc/) to register an account and try the free number generation feature.
2. Recharge a small amount of USDT (about 50 USDT) to experience one screening task, checking cost and speed.
3. Read the documentation (https://docs.kkdata.cc/) to understand detailed parameters and API integration.
4. Follow the official channel (https://t.me/kkdata_channel) for updates, case studies, and promotions.
5. If you encounter problems, directly contact official customer service @kkdata_cc.

Whether you want to precisely target users on Telegram or expand overseas markets through WhatsApp and iMessage, a reliable screening platform can save you a lot of time and money. We hope this Complete Guide to Number Verification Services helps you make an informed choice, avoid pitfalls, and make your overseas customer acquisition more efficient.