In 2025, a year of rapid development in digital marketing, Telegram—with over 800 million monthly active users and a global ecosystem covering more than 200 countries—has become a core channel for cross-border enterprises, foreign trade brands, and service institutions to expand overseas markets. However, as Telegram’s platform risk control rules tighten and user needs become increasingly segmented, the extensive model of "blindly delivering to invalid numbers" is no longer sustainable. An efficient Telegram Number Screening System helps enterprises filter out real, active target users from the source, reducing marketing costs and improving conversion efficiency. As a benchmark tool for Telegram Number Screening Systems in 2025, ITG Global Screening, with its end-to-end solution of "basic verification + in-depth analysis + automated implementation," has become the key for enterprises to break through marketing bottlenecks. This article will systematically break down the operation process of the Telegram Number Screening System, from number format verification to practical application on the ITG platform, providing enterprises with a actionable guide.
In 2025, Telegram has stricter format requirements for number registration and message sending. Non-compliant number formats will not only fail platform verification but may also trigger risk control. Therefore, "format verification + data cleaning" is the first step of the Telegram Number Screening System and the foundation for ensuring the effectiveness of subsequent screening.
Telegram numbers must strictly comply with the E.164 standard set by the International Telecommunication Union (ITU)—a core prerequisite for avoiding "invalid numbers" in global marketing in 2025. Specific specifications include:
- Mandatory country code: Start with a "+" followed by the country/region code (e.g., +86 for China, +1 for the U.S., +91 for India, and exclusive codes for Southeast Asian countries). Numbers without a country code will be deemed "format-invalid" by Telegram, making user reach impossible.
- Remove all special characters: Numbers must not contain spaces, hyphens, parentheses, or other special symbols (e.g., "+1 (123) 456-7890" must be standardized to "+11234567890"). Special characters will cause system unrecognition and affect screening results.
- Compliance with country-specific length requirements: Number lengths vary by country (e.g., 10 digits + country code = 12 digits total for the U.S., 11 digits + country code = 13 digits total for China, and 8-9 digits + country code for some European countries). Numbers with non-compliant lengths will be directly classified as empty.
- Unified storage format: It is recommended to store numbers in Excel or CSV format, with one number per row. Avoid mixing multiple formats in the same column (e.g., including both "+86138xxxx1234" and "138xxxx1234") to facilitate subsequent batch import into the screening system.
In 2025, a cross-border e-commerce enterprise directly imported U.S. numbers like "123-456-7890" into the system without format standardization, resulting in 30% of numbers being judged invalid due to format errors. After standardizing the format, the valid recognition rate increased to 92%.
Collected Telegram number lists often contain duplicate data, incorrectly formatted numbers, and obviously invalid numbers. These must be filtered in advance through data cleaning. The specific process includes:
- Format standardization: Use tools (e.g., Excel data splitting, the "Automatic Format Repair" function of ITG Global Screening) to uniformly supplement country codes, remove special characters, and adjust number lengths, ensuring all numbers comply with the E.164 standard.
- Preliminary filtering of invalid numbers: Eliminate obviously invalid numbers through "basic rule verification," such as "11-digit Chinese numbers containing letters," "U.S. numbers shorter than 12 digits," or "mismatched country codes and regions (e.g., Indian numbers starting with +86)."
- Duplicate data removal: Use the "duplicate recognition" function of the screening system to delete duplicate numbers in the list (e.g., the same number collected through multiple channels). This avoids resource waste from repeated delivery. Enterprise data statistics in 2025 show that duplicate numbers account for an average of 15%, and deduplication can reduce invalid delivery by 15%.
- Preliminary verification of number validity: Use a "format verification interface" to quickly determine whether a number meets Telegram’s registration format (not real registration verification), eliminating numbers that "have correct formats but are obviously unregisterable" (e.g., non-existent number segments like "+8612345678901").
In Q1 2025, a foreign trade enterprise collected 50,000 Telegram numbers. After data cleaning, 12,000 incorrectly formatted numbers and 7,500 duplicate numbers were eliminated, leaving only 30,500 standard-compliant numbers. Subsequent screening efficiency increased by 40%.
If "format verification" is the foundation of the Telegram Number Screening System, then the "basic verification + advanced analysis" functions of ITG Global Screening are the core for achieving "precision screening." In 2025, ITG Global Screening has upgraded its multi-dimensional recognition capabilities to meet Telegram marketing needs—not only judging whether a number is valid but also identifying high-value target users.
Basic verification is one of the core functions of ITG Global Screening. By real-time connecting to Telegram’s data interface, it judges the basic status of numbers and avoids delivery to invalid numbers. Specific functions include:
- Real-time number status detection: Verify in real time whether a number is registered on Telegram and whether it is currently in normal use (empty numbers, disconnected numbers, and canceled numbers are directly marked). The measured accuracy rate in 2025 is 98%, far exceeding the 90% of ordinary screening systems.
- Account activity analysis: Mark user activity levels (e.g., "active in the past 3 days," "active in the past 7 days," "active in the past 30 days," "long-term inactive") based on login frequency and message sending records, avoiding delivery to inactive numbers that "have not logged in for half a year."
- Basic information acquisition: Extract basic information bound to the number (e.g., whether the avatar is a real person, whether the nickname is complete, registration duration), eliminating temporary numbers with "no avatar + no nickname + registration duration < 7 days" (most of these are batch-registered zombie accounts).
- Risk level assessment: Synchronize Telegram’s risk control data in real time to mark "banned accounts," "highly reported accounts," and "abnormal device accounts" (e.g., multiple numbers registered on the same device). This avoids restricting the enterprise’s own marketing accounts due to association with high-risk accounts.
In 2025, a cross-border 3C enterprise used ITG’s basic verification function to screen 100,000 U.S. numbers, eliminating 42,000 invalid numbers and 18,000 high-risk numbers. Delivery was only targeted at 40,000 valid numbers, reducing SMS costs by 60% and avoiding any risk control triggers on the account.
In 2025, competition in Telegram marketing has evolved from "finding valid numbers" to "finding high-value numbers." The advanced analysis functions of ITG Global Screening help enterprises identify target users with needs and high conversion potential through multi-dimensional data modeling. Specific capabilities include:
- User behavior pattern analysis: Analyze user behavior preferences (e.g., "frequently discusses cross-border e-commerce products," "frequently inquires about mechanical parts prices") based on Telegram group chat records, channel interactions (likes/shares), and Bot command trigger records.
- Social network graph analysis: Identify users’ social connections (e.g., whether they have joined industry-related groups, whether they interact with competitor accounts), prioritizing the screening of "industry-specific users" (e.g., outdoor equipment brands targeting users in "hiking enthusiast groups").
- Content preference recognition: Generate interest tags (e.g., "maternity focus," "tech enthusiast," "outdoor sports lover") based on the channel themes users follow and the content types they browse, facilitating subsequent precision content delivery.
- Value potential evaluation: Assess users’ conversion potential (high, medium, low) by combining user activity, interaction frequency, and consumption-related behaviors (e.g., clicking product links, inquiring about prices). Prioritize delivering conversion-oriented content (e.g., limited-time discounts, pre-sales for new products) to high-potential users.
In 2025, a global beauty brand used ITG’s advanced analysis function to screen 25,000 numbers from 100,000 valid Telegram numbers that met the criteria of "females aged 20-35 + active in the past 7 days + follow beauty channels + high potential." It launched a new product trial campaign, achieving an 18% conversion rate—far exceeding the 5% industry average.
In 2025, when enterprises use a Telegram Number Screening System (taking ITG Global Screening as an example), they need to follow a standardized process of "data preparation → platform operation → result application" to ensure efficient screening and precise implementation, avoiding effectiveness issues caused by improper operations.
Data preparation is the prerequisite for ensuring screening effectiveness. In 2025, enterprises should focus on the following 4 tasks:
- Number list organization: Collect Telegram numbers from various channels (exhibitions, official website registrations, third-party cooperation, social platforms) and consolidate them into a single Excel/CSV file. Avoid scattering numbers across multiple spreadsheets to reduce subsequent import troubles.
- Format standardization: Repair number formats according to the E.164 standard (supplement country codes, remove special characters). The "Automatic Format Repair" function of ITG Global Screening can be used to process 100,000 numbers in just 10 minutes.
- Data quality inspection: Manually spot-check 10%-20% of numbers to confirm correct formatting and the absence of obviously invalid numbers (e.g., excessively long numbers like "+86123456789012"), avoiding overall screening impacts due to batch errors.
- Batch processing planning: If the total number of numbers exceeds 500,000, it is recommended to screen in batches (e.g., 100,000-200,000 numbers per batch) to avoid system lag caused by excessive single-import data volume. In 2025, ITG Global Screening supports a maximum single import of 1,000,000 numbers, and batch processing improves stability.
ITG Global Screening has optimized its operation process to meet enterprise needs in 2025. No professional technical skills are required—ordinary employees can complete the process. Specific steps include:
- Batch data import: Log in to the ITG Global Screening platform, enter the "Telegram Number Screening" module, click "Upload File," and select the organized Excel/CSV file (supports a maximum of 50MB). The system automatically identifies the number column, eliminating the need for manual selection.
- Screening parameter setting: Set screening criteria based on marketing needs. For basic screening, options include "retain only normally active numbers," "exclude virtual numbers," and "exclude high-risk numbers." For advanced screening, parameters such as "activity level (past 3/7/30 days)," "interest tags (e.g., cross-border e-commerce)," and "region (e.g., U.S./India)" can be set. In 2025, a new "delivery time recommendation" parameter was added, allowing simultaneous setting of active time periods for target regions.
- Start verification task: After confirming parameters, click "Start Screening." The system displays progress in real time (e.g., "30% completed, remaining time: 1 hour") and supports background operation. Enterprises can close the page, and the system will notify via email upon completion.
- Real-time progress monitoring: In the "Task Management" module, view screening progress, the number of valid numbers identified, and the distribution of invalid number types (e.g., 25% empty numbers, 10% virtual numbers). This facilitates timely parameter adjustments (e.g., if virtual numbers account for a high proportion, strengthen virtual number filtering).
After screening, scientific result processing and implementation are required to realize the value of the Telegram Number Screening System. In 2025, enterprises can operate according to the following steps:
- Data export and backup: After screening, click "Export Results" and select "Export by Category" (valid active numbers, low-active numbers, invalid numbers, high-risk numbers). Back up the original screening data simultaneously to avoid subsequent loss.
- Result statistical analysis: Review the screening report, focusing on "valid number ratio," "activity distribution," and "interest tag distribution" (e.g., 40% valid number ratio, 35% high-active numbers among valid numbers, 30% of valid numbers with "cross-border e-commerce" tags). Use this data to support subsequent marketing strategies.
- User segmentation management: Segment valid numbers by "activity level + value potential" (e.g., "high activity & high potential," "high activity & medium potential," "medium activity & high potential") and sync to the CRM system for subsequent segmented content delivery.
- Marketing strategy development: Develop differentiated strategies for different user segments—for example, push "limited-time discounts + product links" to "high activity & high potential" users, "product cases + demand surveys" to "medium activity & high potential" users, and "industry news + brand updates" to "high activity & medium potential" users.
In 2025, a cross-border apparel enterprise used ITG to screen 40,000 valid Telegram numbers. After segmentation, it pushed Black Friday discounts to 14,000 "high activity & high potential" users, achieving a 4.2% conversion rate—far exceeding the 1.2% conversion rate of non-segmented delivery.
In 2025, Telegram’s platform rules and user behaviors will continue to change. Enterprises need to ensure the stable effectiveness of the Telegram Number Screening System through "quality evaluation + continuous optimization," avoiding the misunderstanding of "one-time screening for the whole year."
Enterprises should evaluate the quality of the Telegram Number Screening System regularly (recommended monthly). Core indicators include:
- Number validity rate: Number of valid numbers / total number of screened numbers. The industry’s excellent level in 2025 is 40%-50%. If it is lower than 30%, check the quality of data sources (e.g., whether numbers are obtained from low-quality channels).
- Data accuracy rate: Number of valid numbers confirmed after actual delivery / number of valid numbers marked by the screening system. The excellent level is above 95%. If it is lower than 90%, adjust screening parameters (e.g., strengthen virtual number recognition, optimize activity judgment standards).
- Processing efficiency: Screening completion time / total number of screened numbers. The industry standard for ITG Global Screening is 3-4 hours for 100,000 numbers. If efficiency is too low, check the network environment or screen in batches.
- Cost-benefit ratio: (Conversion revenue from post-screening delivery - screening cost) / screening cost. The excellent level is above 5:1. If it is lower than 2:1, optimize screening strategies (e.g., focus on high-value tag users).
Based on quality evaluation results, enterprises need to continuously optimize the Telegram Number Screening process. Key optimization directions in 2025 include:
- Regularly update the number database: Clean the existing number database quarterly and re-screen using ITG Global Screening to eliminate numbers that "have changed from valid to invalid" (e.g., user cancellation, disconnection) and supplement numbers collected from new channels.
- Optimize screening parameters: Adjust parameters according to changes in target markets (e.g., when entering the Indian market, strengthen the "main account recognition" parameter; when entering European and American markets, strengthen the "privacy preference recognition" parameter).
- Analyze effectiveness data: Adjust screening priorities based on delivery data (e.g., conversion rates of users with different tags, response rates of users with different activity levels) (e.g., if users with "cross-border e-commerce" tags have high conversion rates, increase the screening weight of this tag).
- Adjust operation strategies: Adjust content strategies based on the tag distribution of screening results (e.g., if users with "maternity" tags account for a high proportion, increase maternity-related content; if users with "tech" tags account for a high proportion, strengthen the promotion of product technical highlights).
ITG Global ScreeningIt is a world-leading number screening platform that combinesGlobal mobile phone number segment selection, number generation, deduplication, comparison and other functions. It supports global customersBulk numbers from 236 countriesFiltering and testing services, currently supportedMore than 40 social and apps, such as:
whatsapp/line, twitter, facebook, Instagram, LinkedIn, Viber, zalo, Binance, signal, skype, DISCORD, Amazon, Microsoft, Truemoney, Snapchat, kakao, Wish, GoogleVoice, Botim, MoMo, TikTok, GCash, Fantuan, Airbnb, Cash, VKontakte, Band, Mint, Paytm, VNPay, Moj, DHL, Okx, MasterCard, ICICBank, Bybwait.
The platform has several features, includingOpen filtering, active filtering, interactive filtering, gender filtering, avatar filtering, age filtering, online filtering, accurate filtering, duration filtering, power-on filtering, empty number filtering, mobile device filteringwait.
Platform providesSelf-sieve mode, sieve mode, fine-sieve mode and custom mode, to meet the needs of different users.
Its advantage lies in the integration of major social and applications around the world, providing one-stop, real-time and efficient number screening services to help you achieve global digital development.
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