Viber Checker: bulk Viber verification, API & CSV output guide

Viber Checker answers whether a contact is registered on Viber. Bulk signal for CRM and marketing ops.

Viber Checker (viber) is Cheker.pro bulk Viber verification. This guide covers mass phone checks, viber API, phone intelligence, list hygiene before SMS/messengers, and CSV export for CRM.

Who it is for

Viber Checker is used by SMS hubs, performance marketing, crypto compliance, call centers and SaaS with Reseller API. If your pipeline segments «has Viber / not» — this task type covers bulk at scale.

What Viber Checker does

Viber account verification. Each input line becomes one CSV row with result fields.

Task type: viber. Family: Viber. Input type: phone.

Pricing and output on Viber Checker landing. Run tasks in dashboard.

Input file format

Upload TXT or CSV: phone numbers in international format (E.164 recommended, e.g. +14155552671). One file = one country only (country code in every line: Brazil 55, US 1, Russia 7).

• Minimum: 1,000 lines per task
• Maximum: 10,000,000 lines (large files auto-split)
• E.164 recommended: +country code, no spaces or brackets
• See format preview in the upload form at Viber Checker

Do not mix phone, email and username in one file. From Excel export a single column to CSV — avoid formulas and scientific notation.

Output fields

• Number
• viber: yes/no

Interpret Number · viber: yes/no with a clear rule: «yes» → Viber channel candidate; «no» → SMS/email fallback or exclude from campaign.

Use cases

• Marketing runs a separate sequence for "Viber: yes".
• Marketing runs a separate sequence for "Viber: yes".
• Marketing runs a separate sequence for "Viber: yes".

How to run a check

1. Sign up at Cheker.pro and top up USDT
2. Open Viber Checker — TXT/CSV upload form
3. Wait for completion in «Мои задачи»
4. Download CSV into CRM / SMS hub / BI
5. Automation: Reseller API — viber

Common mistakes

• Local format without country code → false «no» results.
• Mixed countries in one file → API rejection or wrong output.
• Confusing Viber registration with «number is reachable» — different signals.
• Treating «no» as permanent block without re-check after 7–14 days.
• Bulk-check without legal basis (GDPR / local telecom rules) — validation does not replace consent.

Reading yes/no

"No" on Viber may mean no account, privacy settings, or upstream lag. Do not auto-block on one field alone.

Related Viber checkers

• Viber Days Checker (viber_active) — Detect Viber account activity days and last online time
• Viber Avatar, Age, Gender & Others (viber_senior) — Detect Viber account age, gender and profile information

FAQ

How is Viber Checker different from other Viber checkers?

Task type viber: Viber account verification. Output: Number · viber: yes/no. Compare family variants in the checker catalog and viber landing.

Minimum batch size and file format for viber?

Minimum 1,000 lines. phone numbers in international format (E.164 recommended, e.g. +14155552671). One country per file. Format hints on the upload page.

How much does Viber Checker cost?

Pay-as-you-go USDT: per-line billing at checker rate. Current price per 10k lines on the viber card and dashboard after top-up.

API for Viber Checker?

Yes. Reseller API: POST /api/v1/check with task type viber. Keys: API keys, docs: /docs.

Is bulk checking legal?

Use only lists with opt-in or other lawful basis (GDPR, local rules). Cheker.pro acts as processor on your instructions; you define retention and consent policy.

Summary: Viber Checker is the bulk layer for Viber. Catalog: viber · run → · Cheker.pro blog