How can I filter Viber numbers to find active accounts and improve the reach of mass messaging?

In overseas marketing channels, Viber, with its high penetration rate in Central and Eastern Europe, Southeast Asia, and the Middle East, has become an important choice for many companies to reach overseas users. However, many teams often encounter the following problem: investing in Viber mass messaging, only to find that the delivery rate is far lower than expected. The core issue often lies in the presence of a large number of unregistered or long-term inactive accounts in the number list. The solution lies in introducing a standardized Viber number screening process to identify truly reachable active users before sending mass messages. This article will share a practical operational guide from detection to sending, focusing on the core logic of Viber number screening .

1. Why is Viber number filtering key to improving reach?

Many businesses invest budgets in Viber marketing, but fail to achieve good results due to low-quality phone numbers. A single inaccurate outreach can lead to the following problems:

• Invalid reach : The number is not registered with Viber, and the message cannot be sent.
• Low response rate : Reaching inactive accounts or low-activity users resulted in no response.
• System risk control : Failure to send batches may trigger platform restrictions.
• Resource waste : Accumulated ineffective consumption lowers the overall ROI.

Viber's marketing success relies on "precise targeting" rather than "casting a wide net."

II. What preparations need to be made before filtering Viber numbers?

Before the actual number selection, the original number list needs to be preprocessed:

• Standardized format : Convert all numbers to the international standard format (+country code+mobile number).
• Deduplication : Remove duplicate numbers to avoid wasting detection resources.
• Invalid removal : Delete numbers with incorrect digits or containing illegal characters.
• Regional Classification : Initial grouping of numbers according to target market

3. How to check the registration status of a Viber number?

This is the core part of the screening process, focusing on the following dimensions:

• Registration status verification : Confirm whether the number has already been registered with Viber.
• Last online time : Determines whether a user has been active recently (within 7 days/30 days/90 days).
• Completeness of information : The presence or absence of a headshot and personal profile can be used as supplementary references.
• Device type : Understanding whether a user uses an iPhone or Android helps with subsequent content adaptation.

IV. How to segment users after the screening is completed?

Based on the test results, the numbers are divided into different quality levels:

• Highly active users : Those who have been online recently and have complete information will be given priority for pushing core content.
• Regular active users : Those with a certain level of activity, gradually cultivated by sending regular content.
• Silent users : If a user has been offline for an extended period, consider attempting to wake them up with a lower frequency.
• Unregistered users : Remove them directly to avoid unnecessary costs.

V. How to formulate the sending strategy after layering?

Different outreach methods will be used for different user tiers:

• High-frequency users : Pushing conversion-oriented content such as new products and promotions.
• Regular users : Send news, useful information, and other content to build trust.
• Silent users : Try low-cost wake-up messages such as incentives and questionnaires.
• Sending time : Adjust push notification time according to the user's time zone to improve open rate.

VI. How to achieve efficient Viber number filtering with the help of tools?

When the data volume reaches hundreds of thousands or more, manual inspection can no longer meet efficiency requirements. At this point, specialized tools can be used to complete large-scale screening. For example, with ITG's full-domain screening , only the number file needs to be uploaded to quickly complete the entire process.

• Batch detection : Supports identification of registration status and activity levels for millions of phone numbers.
• Multi-dimensional output : Includes information such as last online time, device type, and carrier.
• Tiered Results : Automatically categorized by activity level for easier differentiated operations later.
• Efficiency Improvement : Compressing several days' worth of work into a shorter timeframe

7. How to continuously optimize the outreach effect after screening?

After completing one round of number screening and mass messaging, a continuous optimization mechanism needs to be established:

• Performance review : Record delivery rate and response rate for different user tiers to validate the selection strategy.
• Standard iteration : Adjusting the activity threshold based on historical data
• Regular review : Viber user status changes dynamically, so it is recommended to review the list every quarter.
• Content adaptation : Optimize the pushed content by combining the region and device information in the filtering results.

Conclusion

Through a standardized Viber number screening process, truly active, high-value users are identified, allowing mass messaging resources to be focused on groups more likely to respond. From data cleaning and status detection to tiered sending and continuous optimization, each step is an effective means of improving reach. Combined with the support of professional tools, every Viber outreach is made more valuable.