01
Upload your list
Import CSV or TXT files with phone number data, then confirm the task settings before processing.
Viber Days Checker
Detect Viber account activity days and last online time.
Price (per 10,000 numbers) $5 USD
Detect Viber account activity days and last online time. Ensure you're reaching active users and filtering out dormant accounts.
Detect Viber account activity days and last online time.
Price (per 10,000 numbers) $5 USD
Detect Viber account activity days and last online time. Ensure you're reaching active users and filtering out dormant accounts.
No account, number, or SIM required
Every check runs through official platform APIs on our own infrastructure. You never connect, bind, or use your own account, phone number, or SIM card — just upload your list or call the API and get results.
- Activity Detection: Verify how long accounts have been active.
- Last Online Tracking: Know when a user was last online.
- Cost Efficiency: Save money by skipping inactive accounts.
- High Accuracy: Reliable activity data for targeting.
Detection signals
What Viber Days Checker detects
Viber Days Checker confirms registration and returns how many days since the account was last online, without messaging or storing the number. Every row comes back with structured activity signals ready to prioritise live users over dormant ones.
Registration status
Confirms whether the phone number is registered on Viber (yes or no).
Days since last online
Returns how many days have passed since the account was last active on Viber, so you can prioritise live users over dormant ones.
Viber internal ID (MID)
The activity task can return Viber's internal account identifier (MID) alongside last-online time and active days.
Passive, no contact
Reads registration and activity signals only. The account holder is never messaged, logged in to, or notified.
Workflow
How Viber Days Checker works
Use Viber Days Checker as part of a repeatable list-cleaning workflow before outreach, CRM imports, or audience segmentation.
02
Run the check
NumberChecker.AI processes the file in bulk and returns structured status signals for each row.
03
Export segments
Download results and route clean, matched, unmatched, or review-needed rows into your next workflow.
Outputs
What you can review after the check
number
activated
mid
last_online_time
active_days
Use cases
Where teams use Viber Days Checker
List cleaning
Remove unsupported or low-confidence records before campaigns or imports.
Audience segmentation
Create groups based on platform, email, phone, or account-related signals.
Review workflows
Send uncertain or high-value records into a separate internal review queue.
Related checks
Pair Viber Days Checker with related products
Explore checks that teams often run before or after this product.
Phone Number Validation
Validate numbering format, line type, and reachability signals before platform-specific checks
Number Active Checker
Detect phone number activity level via big-data analytics to improve SMS delivery and reduce costs
High-value Users Checker
Identify high-value phone users via big-data signals for better targeting and prioritization
iMessage Checker
iMessage account verification
FAQ
Viber Days Checker questions
Can I check phone numbers against Viber Days in bulk? +
Yes. Upload a CSV of up to hundreds of thousands of numbers or call the REST API, then download a result file with registration status and days since last online for every number. You are billed only for successful checks.
Does the check message or notify the person? +
No. The check is passive and reads registration and activity signals only. Nothing is sent to the number, and the account holder is never contacted or notified.
What's the difference between this and Viber Checker? +
Viber Checker only confirms registration (yes/no). Viber Days Checker adds how many days since the account was last online, useful for prioritising active users.
What does N/A mean for days since last online? +
N/A appears when the number is not registered on Viber or the last-online signal isn't available for that account.
Ready to run Viber Days Checker at scale?
Compare pricing, review API options, or create an account to upload your first production list.
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