ITG GLOBAL SCREENING

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By Admin March 17, 2026

Effective number screening empowers marketing cost reduction: Say goodbye to ineffective outreach and reduce unnecessary waste of marketing resources.

In telephone and SMS marketing scenarios, invalid outreach has become a major culprit for the waste of corporate marketing resources. The existence of disconnected, suspended, or unwanted numbers results in a significant loss of marketing expenses and human resources, severely squeezing corporate profit margins. Effective number screening, as a core means to overcome this predicament, can intercept invalid outreach at its source. Effective number screening allows marketing resources to be precisely focused on high-value customer groups, avoiding unnecessary losses from indiscriminate distribution and truly achieving cost reduction and efficiency improvement in marketing. In today's increasingly competitive market, controlling marketing costs has become crucial for corporate survival and development. The strategic significance of effective number screening is becoming increasingly prominent, and it has become an essential measure for companies to optimize their marketing channels and improve resource utilization efficiency.

I. The core of cost reduction in effective number screening: reducing resource waste at the source.

The core value of valid number screening lies in precise cost reduction. By eliminating invalid numbers and targeting precise customer groups, it reduces resource waste at the front end of the marketing chain. Its cost reduction value is mainly reflected in three core aspects:
  • Directly reduce campaign costs : Invalid numbers directly lead to wasted SMS and outbound call costs. Industry data shows that in marketing campaigns without valid number screening, invalid numbers typically account for 30%-50%, and even higher in some industries. This means that nearly half of a company's campaign budget goes unused. By screening for valid numbers, invalid numbers such as inactive or disconnected numbers can be eliminated, allowing resources like SMS and calls to be focused on the target audience. This can reduce the cost of a single marketing campaign by more than 30%.
  • Improving Human Resource Efficiency and Cost Reduction : For telemarketing teams, invalid numbers consume a significant amount of agents' call time and energy. Data shows that traditional telemarketing teams may only generate one valid call out of 100 calls, resulting in an effective call rate of less than 8%. Most of the time is wasted on invalid communication such as disconnected numbers and rejected calls. Improving connection rates and matching needs by filtering valid numbers allows agents to focus on valuable communication, increasing the amount of effective communication by more than four times with the same human resource cost, significantly reducing the human resource cost per customer acquisition.
  • Reducing hidden costs : Blindly pushing marketing messages to irrelevant users not only leads to user complaints but also damages brand reputation, generating incalculable hidden costs. Precise and effective number filtering can avoid harassing users with marketing messages, reducing complaint rates, while ensuring that users with needs receive timely and useful information, improving brand favorability, reducing business loss due to negative word-of-mouth, and indirectly lowering brand maintenance costs.

II. Core Criteria for Valid Number Screening: Accurately Blocking Invalid Numbers

To realize the cost-saving benefits of effective number screening, it is necessary to define scientific screening criteria. This involves comprehensively blocking invalid numbers while avoiding the mis-screening of valid customer groups. The core can be divided into two main levels: basic cleaning and precise screening.

1. Basic screening criteria: Eliminating invalid numbers (core category)

Basic screening is the "first line of defense" for filtering valid numbers. Its core objective is to comprehensively eliminate obviously invalid numbers, directly reducing the consumption of basic resources. It mainly includes the following four categories:
  • Invalid or suspended numbers: These are the most common types of invalid numbers and need to be queried in real time through the operator's interface or verified and removed by authoritative data.
  • Virtual numbers and test numbers: such as virtual operator test numbers starting with 147, 170, etc. These numbers are mostly for temporary use and do not have stable user attributes. They need to be compared and filtered through the number segment rule database.
  • Incorrectly formatted numbers: Numbers that are not 11 digits, contain special characters, or have incorrect number segments can be quickly checked and filtered using regular expressions (such as ^1(3-9)\d{9}$).
  • High-frequency complaint numbers: Users associated with these numbers are highly sensitive to marketing messages and are prone to making complaints. These numbers need to be added to a blacklist for effective number filtering and removal.

2. Precise screening criteria: Targeting high-value customer groups

After the initial screening is completed, further precise screening is needed to enhance the value of the numbers, directing marketing resources towards high-intent customer groups and maximizing cost reduction and efficiency. Core screening dimensions include:
  • User attribute dimensions include region (e.g., targeting customers in specific cities), age, gender, occupation, etc., which can be combined with business scenarios to filter matching customer groups. For example, marketing of maternal and infant products can filter valid phone numbers corresponding to female customers aged 25-35.
  • User behavior dimension: Combining users' past consumption records, consultation records, and click records on marketing links, we filter out valid phone numbers with potential demand. For example, users who have previously purchased home appliances can be included in the scope of valid phone numbers for new home appliance marketing.
  • Number activity level: This is determined by analyzing recent call and SMS interaction records. Users with high-activity numbers are more likely to receive and respond to marketing messages, making it a core objective in effective number selection.

III. Practical Process for Valid Number Screening: Steps to Implement Cost Reduction Across the Entire Chain

Valid number screening must follow a full-chain process of "compliant collection - basic cleanup - precise stratification - tool empowerment - dynamic optimization" to ensure that each step revolves around the core of "cost reduction". The specific practical steps are as follows:

1. Data Collection and Preprocessing: Laying the Foundation for Screening

First, integrate the company's existing legal and compliant phone number resources, including customer registration data, marketing campaign retention data, and compliantly acquired third-party data, to form a unified phone number database. Simultaneously, preprocessing is performed to clean up duplicate numbers and correct incorrectly formatted numbers, avoiding additional costs due to duplicate distribution. Special attention must be paid to ensuring that data collection complies with relevant regulations such as the "Regulations on the Management of Short Message Services," to avoid legal risks and additional losses due to illegal data acquisition.

2. Basic Filtering: Remove invalid numbers

Using number verification tools or operator interfaces, perform basic screening on the pre-processed numbers. This includes removing invalid or suspended numbers by real-time number status queries; eliminating virtual and test numbers by comparing against a number segment rule base; and removing numbers with incorrect formats using regular expression validation. This step is fundamental to reducing the cost of effective number screening, directly reducing ineffective deployment costs by 30%-50% and rapidly improving the overall quality of number resources.

3. Precise Targeting: Identifying High-Value Customers

By combining business objectives with user profiles, valid phone numbers after initial screening are stratified to ensure resources are precisely matched to different value customer groups. This can be achieved by linking user attributes and consumption behavior data through a CRM system, categorizing valid numbers into high-intent, potential, and dormant customer groups. For example, high-intent customers can be prioritized for the telemarketing team, while potential customers can receive targeted promotional information via SMS. This avoids wasting high-cost marketing efforts on low-value customers, enabling tiered resource allocation and further reducing the cost per customer acquisition.

4. Tool-assisted methods: Improve screening efficiency and accuracy

For massive numbers, relying solely on manual screening is inefficient, prone to errors, and difficult to achieve scalable cost reduction. In such cases, professional screening tools can be used to improve the efficiency and accuracy of effective number selection. For example, the ITG full-domain screening tool has core functions such as full-domain number verification, multi-dimensional filtering, and real-time data updates. It can connect to multiple operator interfaces to query number status in real time and accurately identify invalid numbers such as empty or suspended numbers. It also supports custom filtering dimensions such as region, activity level, and user attributes, quickly identifying high-value valid numbers and reducing screening time by more than 80%. Compared to traditional manual screening, it significantly reduces labor and time costs in the screening process, allowing the cost reduction benefits of effective number screening to be realized more quickly.

5. Dynamic optimization: Continuously iterating selection criteria

Valid number screening is not a one-time solution; it requires continuous optimization of screening criteria based on marketing performance data to maximize cost reduction. Regularly analyze connection rates, conversion rates, and cost data across different screening dimensions, and adjust screening conditions accordingly. For example, if the conversion rate of valid numbers in a certain region is low and the cost of advertising is high, the screening criteria for that region can be tightened; if the response rate of valid numbers for a certain user attribute is high and the customer acquisition cost is low, the screening scope for that customer group can be expanded. Through dynamic iteration, the selection of valid numbers can be made more aligned with cost reduction needs.

IV. Cost Reduction Techniques for Valid Number Screening: Advanced Methods to Improve Resource Utilization Efficiency

Building upon the basic process, combining the following advanced techniques can further amplify the cost-saving value of effective number screening and reduce unnecessary waste of marketing resources:
  • Establish a dynamic blacklist and whitelist system : Numbers with high complaint rates and those that explicitly refuse to receive marketing messages are included in the blacklist and are directly removed during the screening of valid numbers to avoid duplicate and ineffective campaigns; Numbers with high response rates and high conversion rates are included in the whitelist, and marketing resources are given priority to them. At the same time, similar customer groups are identified to achieve precise customer acquisition and improve the efficiency of resource reuse.
  • Combine scenario-based segmentation and screening strategies : Different marketing scenarios have different cost sensitivities and customer needs, requiring targeted adjustments to the effective number screening strategy. For example, local restaurant marketing can focus on screening active and effective numbers within a 3-kilometer radius of the store to reduce the ineffective costs of cross-regional advertising; online e-commerce promotions can screen effective numbers with past purchase records to improve conversion efficiency and reduce the losses from blind advertising.
  • Compliance-based screening mitigates risks and costs : The screening process for valid phone numbers must strictly adhere to relevant regulations to ensure the legality of the numbers' sources and the compliance of the screening process. User consent must be obtained before sending marketing SMS messages, and an "unsubscribe" option should be provided to avoid complaints and fines due to violations, thus increasing additional costs. Compliance is a prerequisite for reducing costs in valid number screening; the hidden costs of illegal marketing far exceed the initial investment.
In summary, effective number screening is a core tool for businesses to reduce marketing costs. Its core value lies in accurately blocking invalid numbers and focusing on high-value customer groups, thereby reducing unnecessary waste of marketing resources at the source. Businesses need to establish a comprehensive effective number screening system encompassing "basic screening + precise segmentation + tool empowerment + dynamic optimization," leveraging professional tools such as ITG's full-domain screening to improve screening efficiency, and combining scenario-based strategies with compliance requirements to amplify cost reduction effects. In the current market environment, those who excel at effective number screening can control costs while improving marketing precision, achieving the marketing goal of "cost reduction without sacrificing efficiency." In the future, with the upgrading of data technology, effective number screening will become more intelligent, becoming a key support for businesses to enhance their marketing competitiveness.

ITG Global Screening is a leading global number screening platform that combines global number range selection, number generation, deduplication, and comparison. It offers bulk number screening and detection for 236 countries and supports 20+ social and app platforms such as WhatsApp, Line, Zalo, Facebook, Telegram, Instagram, Signal, Amazon, Microsoft and more. The platform provides activation screening, activity screening, engagement screening, gender/avatar/age/online/precision/duration/power-on/empty-number and device screening, with self-screening, proxy-screening, fine-screening, and custom modes to suit different needs. Its strength is integrating major global social and app platforms for one-stop, real-time, efficient number screening to support your global digital growth. Get more on the official channel t.me/itgink and verify business contacts on the official site. Official business contact: Telegram: @cheeseye (Tip: when searching for official support on Telegram, use the username cheeseye to confirm you are talking to ITG official.)