How to bulk-check Zalo numbers — zalo_gender on Cheker.pro

Bulk-check zalo_gender shows who to reach on messenger vs SMS.

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

Who it is for

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

What Zalo Age & Gender Checker does

Detect Zalo account age, gender and profile information. Each input line becomes one CSV row with result fields.

Task type: zalo_gender. Family: Zalo. Input type: phone.

Pricing and output on Zalo Age & Gender 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: 500 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 Zalo Age & Gender 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

• activated
• age
• gender
• avatar

Interpret activated · age · gender · avatar with a clear rule: «yes» → Zalo channel candidate; «no» → SMS/email fallback or exclude from campaign.

Use cases

• Antifraud adds zalo_gender to risk score.
• Antifraud adds zalo_gender to risk score.
• Antifraud adds zalo_gender to risk score.

How to run a check

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

Common mistakes

• Local format without country code → false «no» results.
• Mixed countries in one file → API rejection or wrong output.
• Confusing Zalo 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 Zalo may mean no account, privacy settings, or upstream lag. Do not auto-block on one field alone.

Related Zalo checkers

• Zalo Checker (zalo) — Zalo account verification
• Zalo Days Checker (zalo_active) — Zalo account activity days detection

FAQ

How is Zalo Age & Gender Checker different from other Zalo checkers?

Task type zalo_gender: Detect Zalo account age, gender and profile information. Output: activated · age · gender · avatar. Compare family variants in the checker catalog and zalo_gender landing.

Minimum batch size and file format for zalo_gender?

Minimum 500 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 Zalo Age & Gender Checker cost?

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

API for Zalo Age & Gender Checker?

Yes. Reseller API: POST /api/v1/check with task type zalo_gender. 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: Zalo Age & Gender Checker is the bulk layer for Zalo. Catalog: zalo_gender · run → · Cheker.pro blog