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Phone, Messaging & Account Verification for Single, Bulk, and API Workflows

Explore phone, messaging, carrier, email, and account checks for single lookups, bulk CSV/TXT lists, and asynchronous API jobs.

WhatsApp Checker Telegram Checker Phone Validation Carrier Lookup
Messaging Phone Intelligence Social & Account Exchange

Compare products by platform, input, pricing, and output fields. Then choose the workflow that fits: a single lookup, a bulk file, or an API job.

Single lookup Check one identifier instantly. Use the interactive tools when you need an immediate result for one number or account lookup. Bulk Upload CSV/TXT lists and export results. Upload a list for cleaning, segmentation, and CRM preparation. Task-based API Submit, poll, and download at scale. Submit jobs from your backend, check their status, and download the results.
Data Scrubber Clean mixed contact files before choosing product-specific checks. Phone List Cleaning Prepare phone lists for phone validation, carrier lookup, SMS, and WhatsApp. Lead Enrichment Enrich lead files with validation and channel availability signals. E.164 Format Normalize numbers before validation, API jobs, and CRM imports. UK Phone Checker Check UK mobile, landline, VoIP, carrier, and segments. Number Portability Use MNP and carrier portability signals for routing workflows. International Validation Validate global phone files across countries and formats. Lead Screening Filter low-quality, duplicate, risky, or wrong-channel leads. Messaging App Checker Compare WhatsApp, Telegram, Viber, LINE, Zalo, and related checks. Social Media Lookup Choose social and account checks for phone or email files.

Country and workflow pages

Open specialized pages for country validation, WhatsApp regional checks, carrier lookup, activity signals, and account-specific inputs.

Phone validation

Bulk Phone Number Validator | Bulk CSV Validation Tool | ZelNum Phone Status Check | Single & Bulk Verification | ZelNum US Phone Number Validator | Bulk CSV Validation Tool | ZelNum India Phone Number Verification | ZelNum Nigeria Phone Number Validator | ZelNum Brazil Phone Number Checker | Bulk Phone Account Checks | ZelNum Indonesia Phone Number Validator | ZelNum Pakistan Phone Number Checker | Bulk Phone Account Checks | ZelNum Mexico Phone Number Validator | Bulk CSV Validation Tool | ZelNum Germany Phone Number Checker | Bulk Phone Account Checks | ZelNum Canada Phone Number Checker | Bulk Verify | ZelNum France Phone Number Validator | Bulk Verify | ZelNum Australia Phone Number Validator | Bulk Verify | ZelNum

Account signals

Lead Enrichment Tool | Bulk CSV & API Checks | ZelNum Telegram Activity Checker | Bulk CSV Lookup | ZelNum Viber Activity Checker | Bulk List Hygiene Signals | ZelNum Facebook Email Checker | Bulk Email Account Checks | ZelNum Instagram Number Checker | Single & Bulk Verification | ZelNum Amazon Email Checker | Bulk Email Account Checks | ZelNum Apple ID Number Checker | Bulk Phone Account Checks | ZelNum HTX Email Checker for HTX and Huobi Lists | ZelNum CoinW Phone Number Checker for Bulk Runs | ZelNum KuCoin Email Checker for Bulk Lists | ZelNum

Messaging Checkers

Run a single lookup, upload a bulk list, or automate checks through the API for WhatsApp, Telegram, Viber, and other messaging apps.

Phone Intelligence

Start with a single-number lookup, then move to bulk files or API jobs as volume grows.

Social & Account Checkers

Review social and account signals for enrichment, campaign preparation, and risk work.

Exchange & Risk Checkers

The exchange checks on this page are designed for bulk list verification and risk review.

FAQ

Frequently asked questions

Common questions about this page, the underlying products, and the verification workflows we run for B2B teams.

How many checker products does ZelNum offer and across how many platforms?
ZelNum offers verification across 23+ platforms, grouped into 8 product clusters: phone validation, carrier lookup, WhatsApp, Telegram, messaging apps (iMessage, Viber, RCS, Signal, LINE, Zalo, Band), social platforms (Facebook, Instagram, X/Twitter, Snapchat, Messenger), account verification (Apple ID, Microsoft, Amazon), and crypto exchanges (Binance, KuCoin, HTX, CoinW).
Do all products share the same API and CSV upload?
Use the same account and credit balance across the available product workflows. Choose a single lookup, bulk file, or asynchronous API job based on your volume.
How is pricing structured across these products?
Prices are pay-as-you-go. Costs are shown per 10,000 lookups and vary by product. Bulk and single lookup prices are separate. The pricing page is the sole source for product rates and minimum batch sizes.
Can I bundle products or build a custom workflow across multiple checkers?
You can combine checks as part of a review process, upload a CSV for bulk work, or call the API from your own application.
Do you offer higher-volume support?
Yes. For high-volume customers (>10M lookups/month), we offer priority processing, custom rate limits, and a named support contact. Contact sales for higher-volume pricing.
Trust and data handling

Trust, privacy, and responsible use

Use authorized data only. ZelNum provides verification signals, not identity proof, legal approval, or permission to contact a person.

Contact UsSupport email, what to include with a request, and typical response windows.About ZelNumCompany context, product boundaries, supported workflows, and contact paths.Security and Data HandlingHow uploads, API requests, verification results, and customer responsibilities are described.Privacy PolicyHow account data, uploaded files, support requests, billing references, and privacy choices are handled.Terms of ServicePermitted and prohibited uses, consent requirements, and the limits of the verification service.
AI answer engines

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Open ZelNum in your preferred AI assistant to review its bulk WhatsApp, Telegram, phone validation, carrier lookup, social account, crypto exchange, CSV upload, and API workflows.

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