Comments
>log in to commentWe built ZelNum so teams can verify phone numbers and email addresses two ways: paste a list into the browser and screen it in bulk (no code, TXT/CSV up to hundreds of thousands of rows), or call the realtime REST API. 58 products — WhatsApp, Telegram, Binance, LINE, Zalo and more — one API key. Happy to answer anything about the bulk pipeline or the async job model.
- Realtime & bulk WhatsApp, Telegram & phone number checks
- Pay‑as‑you‑go pricing with a free $1 trial credit
- CSV/TXT bulk uploads and API endpoints for automated workflows
- Export clean segments (registered, inactive, duplicate, review)
- Practical status fields: registration, carrier, line type, country, risk
ZelNum verifies WhatsApp, Telegram, phone and social platform numbers and provides carrier, risk and activity signals.
- for
- Teams that need to clean contact lists, run campaigns, or verify user accounts.
- pricing
- pay as you go · free trial
- license
- MIT
Key features
- Real-time & bulk checks — Validate WhatsApp, Telegram and phone numbers instantly or via CSV/TXT uploads.
- Carrier & line-type lookup — Add carrier, line type and routing signals to each number.
- Risk & activity signals — Get registration status, account age, online presence and VoIP risk indicators.
- API integration — Automate single lookups or batch jobs through REST endpoints.
- Multi-platform coverage — Supports 40+ platforms including social apps and crypto exchanges.
- Exportable results — Download cleaned segments (valid, inactive, risky) for CRM or marketing use.
Use cases
- Clean lead lists before a WhatsApp marketing campaign.
- Validate phone numbers for SMS outreach and routing.
- Screen accounts for fraud risk in onboarding flows.
- Enrich CRM contacts with carrier and activity data.
ZelNum pricing
- WhatsApp Number Checker$0.5/10K lookupsReal-time check · Bulk CSV support
- Telegram Number Checker$1.5/10K lookupsReal-time check · Bulk CSV support
- Phone Validation$4/10K lookupsCarrier lookup · Risk filtering
ZelNum vs alternatives
 ZelNum |  Twilio |  Vonage |  Postman |  Algolia | |
|---|---|---|---|---|---|
| Best for | Bulk phone & messaging verification | SMS & voice verification | SMS/voice verification | API design & testing | Search & discovery |
| Pricing | Pay as you go | Subscription | Subscription | Subscription | Subscription |
| DevHunt upvotes | 1 | 0 | 0 | 0 | 0 |
| Launched | Oct 2026 | — | — | — | — |
- ZelNum vs Twilio: Twilio offers SMS/voice verification but not bulk WhatsApp/Telegram list cleaning.
- ZelNum vs Vonage: Vonage provides verification APIs for SMS/voice but lacks the extensive social platform coverage.
- ZelNum vs Postman: Postman is an API testing tool, not a phone or messaging verification service.
- ZelNum vs Algolia: Algolia is a search API, unrelated to contact verification.
ZelNum FAQ
What platforms does ZelNum support?+
It supports phone validation, carrier lookup, WhatsApp, Telegram, major social platforms and crypto exchange account checks.
Can I try ZelNum for free?+
Yes, single-lookup tools are free and you can start with a $1 free credit for bulk checks.
Is bulk upload available?+
Yes, you can upload CSV or TXT files for batch verification and download segmented results.
Do you provide an API?+
Yes, ZelNum offers REST endpoints for phone status, carrier lookup, WhatsApp and Telegram checks, both synchronous and asynchronous.
How is the data priced?+
Pricing is per-lookup or per-10 000 rows with no monthly fee, no seat licence and no minimum commitment.
Summarized by DevHunt from zelnum.com · Oct 9, 2026. Details may change; check the official site.
