Band checker band: use cases, compliance & integration

Band checker on Cheker.pro: file upload → CSV, no manual number probing.

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

Who it is for

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

What Band Checker does

Band account detection by phone number. Each input line becomes one CSV row with result fields.

Task type: band. Family: Band. Input type: phone.

Pricing and output on Band 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: 100 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 Band 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
• band: yes/no

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

Use cases

• CRM enrichment before look-alike campaigns.
• Marketing runs a separate sequence for "Band: yes".
• CRM enrichment before look-alike campaigns.

How to run a check

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

Common mistakes

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

FAQ

How is Band Checker different from other Band checkers?

Task type band: Band account detection by phone number. Output: Number · band: yes/no. Compare family variants in the checker catalog and band landing.

Minimum batch size and file format for band?

Minimum 100 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 Band Checker cost?

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

API for Band Checker?

Yes. Reseller API: POST /api/v1/check with task type band. 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: Band Checker is the bulk layer for Band. Catalog: band · run → · Cheker.pro blog