More than just filtering out invalid numbers! How can real-time phone number filtering mitigate marketing risks?

Amid the continuous rise of enterprise marketing costs, phone communication remains a key channel for connecting with customers. However, the ineffective consumption caused by invalid and out-of-service numbers, as well as compliance risks brought by fraudulent numbers, have become "invisible traps" in marketing. The emergence of real-time invalid phone number screening technology has completely broken the one-dimensional perception of "only screening invalid numbers". It can not only verify the validity of numbers in milliseconds but also simultaneously identify risky statuses such as out-of-service and fraudulent numbers, serving as a core tool for enterprises to reduce costs and avoid risks. Especially for high-frequency outbound call industries like cross-border e-commerce and finance, the value of real-time invalid phone number screening has long gone beyond "saving dialing time"—a single accidental contact with a fraudulent number may trigger customer complaints, and a message sent to an out-of-service number may lead to operator blocking. The "full-status protection network" built by real-time invalid phone number screening is precisely the key to resisting these risks.

I. Beyond Invalid Number Identification: Risk Prevention Value of Real-Time Phone Number Screening

Traditional number screening tools can only distinguish between "invalid numbers" and "non-invalid numbers", but allow out-of-service and fraudulent numbers to slip through the cracks. Data shows that about 23% of ineffective costs in enterprise marketing come from outbound calls to out-of-service numbers, and 17% of compliance risks are related to accidental contact with fraudulent numbers. Through "full-status identification + risk grading", real-time invalid phone number screening extends protection to the entire marketing process, with its core value reflected in three major scenarios.

1. Blocking Out-of-Service Numbers: Avoiding Resource Waste and Operator Penalties

Although out-of-service numbers are not "invalid numbers", they also fail to enable effective communication. Moreover, frequent message pushes to out-of-service numbers are likely to be judged as spam marketing by operators. The out-of-service identification capability of real-time invalid phone number screening can solve this problem from the source:

Real-Time Status Synchronization: Directly connected to the core database of operators, it can identify the out-of-service status within 10 milliseconds after the update, avoiding misjudgment caused by "data lag" of traditional offline tools;
Precise Cost Control: An overseas e-commerce enterprise reduced 12,000 outbound calls to out-of-service numbers monthly through this function, saving over 80,000 yuan in labor costs and reducing SMS sending costs by 35%;
Maintaining Operator Trust: Effectively reducing the invalid push rate, avoiding the blocking of marketing channels, and ensuring long-term communication rights.

2. Identifying Fraudulent Numbers: Building a Dual Defense Line for Compliance and Customer Trust

Fraudulent numbers often start with "00" or are associated with fraud-related IPs. Once an enterprise's outbound call system contacts such numbers, it may not only trigger anti-fraud warnings but also arouse customers' doubts about "the enterprise's connection with fraud". The fraud identification capability of real-time invalid phone number screening has built a three-dimensional defense based on AI algorithms:

Dynamic Update of Feature Database: Integrating the fraud-related number database of the Ministry of Industry and Information Technology and operator signaling data, it real-time collects more than 10 types of fraud features such as frequent IP changes and high-frequency call transfers;
Risk Grading Early Warning: Classifying fraudulent numbers into two levels: "high-risk" and "suspicious". High-risk numbers are directly blocked, while suspicious numbers are marked and prompt manual review;
Remarkable Practical Results: After an insurance enterprise in Guangdong applied this function, the accidental contact rate with fraudulent numbers dropped from 5.3% to 0.1%, and customer complaints decreased by 62%.

3. Distinguishing Inactive Numbers: Precisely Locating Effective Customers

In addition to invalid and risky numbers, "inactive numbers" that have not been used for a long time will also reduce conversion efficiency. Real-time invalid phone number screening can simultaneously identify the activity level of numbers:

Output of Activity Labels: Combining call records in the past 30 days to mark statuses such as "highly active", "low active", and "inactive";
Targeted Resource Allocation: Prioritizing the push of core marketing content to highly active numbers, and switching to SMS contact for inactive numbers. A home furnishing brand increased its conversion efficiency by 28% based on this strategy.

II. Technical Support: Full-Status Identification Logic of Real-Time Phone Number Screening

The reason why real-time invalid phone number screening can realize the simultaneous identification of "invalid + out-of-service + fraudulent" numbers lies in the dual technical support of "real-time data connection + AI modeling", and its operation logic can be divided into three steps.

Step 1: Real-Time Connection with Operator Data: Accessing the databases of the three major domestic operators and overseas operators through official API interfaces, the number status update is synchronized with the operator system, ensuring the accuracy of out-of-service and invalid number identification reaches over 99.2%;
Step 2: Intelligent Matching of Fraud-Related Features: Drawing on the technical ideas of "IMS fixed-line fraud detection" from Shaanxi Mobile, modeling the features of number IP addresses, call behaviors, and abnormal home locations to realize millisecond-level matching of fraudulent numbers;
Step 3: Multi-Dimensional Result Output: Finally generating five types of labels: "valid active numbers", "out-of-service numbers", "invalid numbers", "high-risk fraudulent numbers", and "suspicious numbers", providing clear basis for marketing decisions.

III. Implementation Path: Full-Process Application Method of Real-Time Phone Number Screening

Integrating real-time invalid phone number screening into the entire marketing process requires following the closed loop of "screening - verification - contact - review" to ensure that every step is accurate and controllable.

1. Data Preprocessing: Building the Initial Number Pool

Sorting out number sources according to business scenarios. For example, cross-border e-commerce can integrate platform lead information and independent site registration data, while financial institutions can extract customer reserved numbers. Initially eliminating invalid data with incorrect formats to reduce interference for real-time invalid phone number screening.

2. Real-Time Verification: Completing Full-Status Screening

Importing the initial number pool into the real-time invalid phone number screening system to complete batch verification, with core operations including:

Batch Efficient Processing: Supporting 10 million-level data detection per hour, and completing the full verification of a 100 million-level number pool in only 3 days;
Classified Application of Results: Directly using valid active numbers for outbound calls, marking out-of-service numbers for regular review, and permanently blacklisting fraudulent numbers;
Cross-Border Adaptation and Adjustment: For overseas numbers, simultaneously identifying the roaming status and local operator rules to avoid compliance risks.

3. Precise Contact: Customizing Strategies Based on Status

Implementing differentiated pushes based on the results of real-time invalid phone number screening, for example:

Adopting the combined mode of "voice outbound call + SMS follow-up" for valid active numbers;
Only sending monthly preferential SMS to low-active numbers to avoid high-frequency disturbances;
Pushing "return exclusive benefits" to numbers that were once out-of-service but now reactivated to improve conversion.

4. Dynamic Review: Optimizing Screening Rules

Updating screening strategies monthly based on outbound call data, such as adding the identification feature of "high-frequency calls at night" for a certain type of fraudulent numbers; conducting secondary verification of existing numbers through real-time invalid phone number screening every quarter to ensure the "freshness" of the number pool.

IV. Tool Empowerment: ITG Global Screening Enhances Risk Prevention Efficiency

Manual number classification is error-prone, and traditional tools are difficult to update fraud-related features synchronously. Through "intelligent integration + dynamic upgrading", the ITG Global Screening tool maximizes the value of real-time invalid phone number screening, with core advantages reflected in:

Full-Status Identification Integration: Built-in core module of real-time invalid phone number screening, which can identify 9 types of risky statuses including "virtual numbers" and "collection-marked numbers" in addition to invalid, out-of-service and fraudulent numbers;
Real-Time Update of Fraud-Related Features: Linking with public security anti-fraud systems and operator signaling platforms to update the fraud-related feature database every 24 hours, adapting to the updating rhythm of fraud methods;
Cross-Border Compliance Adaptation: Complying with GDPR and data protection regulations of various countries, with full-process encrypted data transmission, no storage of complete numbers, and only returning status results;
Outstanding Practical Results: After a European cross-border e-commerce enterprise used it, the efficiency of real-time invalid phone number screening increased by 78%, the accidental contact rate with fraudulent numbers dropped to 0.08%, and marketing costs decreased by 40%.

V. Conclusion

The essence of marketing is precise connection, and real-time invalid phone number screening is precisely the "technical cornerstone" to achieve this goal. It goes beyond screening invalid numbers, but also reduces resource waste through out-of-service number identification and avoids compliance risks through fraudulent number blocking, ensuring every outbound call is based on "effectiveness + security". In today's increasingly strict anti-fraud supervision, instead of passively responding to risks, enterprises should take the initiative to build a protection network with real-time invalid phone number screening and improve efficiency through professional tools such as ITG. Only by integrating "full-status identification" into the marketing gene can enterprises control costs while building a solid foundation of customer trust and compliance, making phone marketing a driving force for enterprise growth again.

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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