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2025-06

A practical guide to detecting international air numbers and filtering out invalid overseas customer numbers

In the process of overseas marketing or cross-border sales, have you ever encountered such a situation: the customer’s mobile phone number bought at a high price has a high SMS bounce rate, no one reads the WhatsApp message, and the phone call cannot be reached? In most cases, these problems are not that the customer is deliberately ignoring you, but that you can't contact anyone at all. The number is empty, false, or invalid. To solve this problem, the key is to do one thing beforehand: international air number detection. This article will take you step by step to understand what empty number detection is, why it must be done, how to operate it more efficiently, and recommend a batch screening platform that is truly suitable for cross-border business.

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