CheckNumber.AI 
Viber Checker
viber $0.5 per 10,000 checks
- Core data available
- number, activated
- Best for
- Registration filtering
No-code CSV REST API Exportable results
Check Viber Registration & Activity
Verify Viber account presence, then check activity days, last-online time, and internal Viber ID.
CheckNumber's Viber checker tells you whether a phone number is registered on Viber and how recently that account was online, without messaging or storing the number. Upload a CSV of numbers or call the REST API, and every row comes back with a clear registration verdict plus an activity signal, ready to clean lists, match audiences, or route into your CRM.
E.164
Phone input
From $0.50
Per 10,000 checks
3
Task types
Submitted number +380•••••••••
Registration status yes / no
Recent activity time / days
Public profile data when available
Viber Checker Viber Days Checker Viber Avatar, Age, Gender & Others Checker 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.
What CheckNumber detects for Viber
Registration status
Confirms whether the phone number has a registered Viber account (yes or no), so you can filter out unregistered numbers before outreach.
Days since last online
Returns how many days since the account was last active on Viber, so you can prioritise live users over dormant ones.
Bulk verdict
Every number comes back with a clear result, ready to filter and segment.
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.
What You Can Check
Choose the Viber fields your workflow needs
Start with registration for a narrow verdict, add activity recency when needed, or choose the profile task for available public account and avatar signals.
Viber Days Checker
viber_active $5 per 10,000 checks
- Core data available
- number, activated, mid, last_online_time, active_days
- Best for
- Activity-based segmentation
Viber Avatar, Age, Gender & Others Checker
viber_senior $15 per 10,000 checks
- Core data available
- number, activated, last_online_time, active_days, mid, nickname, person_count, avatar_type, age, skin_color, gender, avatar
- Best for
- Authorised profile-enrichment review
| Viber product | Task type | Input | Core data available | Best for | Current price |
|---|---|---|---|---|---|
| Viber Checker API documentation | viber | Phone numbers in E.164 format | number, activated | Registration filtering | $0.5 per 10,000 checks |
| Viber Days Checker API documentation | viber_active | Phone numbers in E.164 format | number, activated, mid, last_online_time, active_days | Activity-based segmentation | $5 per 10,000 checks |
| Viber Avatar, Age, Gender & Others Checker API documentation | viber_senior | Phone numbers in E.164 format | number, activated, last_online_time, active_days, mid, nickname, person_count, avatar_type, age, skin_color, gender, avatar | Authorised profile-enrichment review | $15 per 10,000 checks |
Core Viber data
Core Viber data by task
Each higher-depth task exposes additional fields; optional profile values should not be assumed for every registered number.
Registration
viber - Submitted number
- The phone number supplied for the check.
- Registration status
- Whether the number returns an active Viber account result.
Activity
viber_active - Registration status
- Whether a Viber account was found.
- Recent activity
- Available last-online time and active-days information.
Profile
viber_senior - Account identity
- Available internal member ID and profile display name.
- Recent activity
- Available last-online timestamp and activity window.
- Avatar and photo attributes
- Public avatar URL and available probabilistic age and gender estimates.
Profile and image-derived fields can be missing and are not proof of identity. Process only records you are authorised to use.
Run the right Viber task
Keep the input format consistent and select only the output depth required by the use case.
- 1
Upload E.164 numbers
Prepare one international number per row for CSV or API submission.
- 2
Select result depth
Choose registration, activity, or profile fields.
- 3
Review optional values
Export results and allow for missing activity or public-profile fields.
Common Use Case
Improve Viber list quality before outreach
Segment active Viber users for higher-response outreach.
No-code CSV REST API Exportable results
Signal 1
Registration check — confirm in bulk whether each phone number has a registered Viber account.
Signal 2
Activity signal — see how many days since the account was last online, so you can prioritise live users.
Signal 3
Privacy-safe — a passive check that never messages, logs in, or notifies the account holder.
Viber FAQ
Can I check phone numbers against Viber in bulk?
Yes. Upload a CSV of up to hundreds of thousands of numbers or call the REST API, choose the task type you need, then download a result file with a registration verdict for every number. You are billed only for successful checks.
Can I see how active a Viber account is?
Yes. The activity task type returns the number of days since the account was last online, so you can prioritise recently active users over dormant ones.
Does a Viber 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 owner is never contacted or notified.
Is there a free trial?
Yes. New accounts receive 1,000 free checks on signup with no credit card, and every check is pay-as-you-go with no monthly fee, and the credits you top up never expire.
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