Pick the right channel before you reach out
NumDetect shows which apps a phone number uses, so you can pick the right channel before reaching out. Bulk lists and email checks are supported too.
Built around one question: which channel?
Before contacting someone, the usual question is simple: WhatsApp or Telegram? NumDetect puts a number's results for several platforms side by side, and a list uploads once, is grouped by country for you and comes back in its original order.
- Phone + email checks
- 14 + 5
- Lowest price per check
- $0.0001
- For a mixed-country list
- 1 upload
- Unknown single-check results
- Free
One number, many platforms
Pick several platforms at once and get the answers together, instead of checking one by one.
Results in context
Keep source rows, duplicate mappings and separate product outcomes for reconciliation.
A practical route to integration
Start in the dashboard, then run the same single and bulk checks through the API.
Useful answers, with clear limits
Keep unknown results visible, protect your inputs and understand the difference between account presence and a successful delivery.
Account signals have limits
Checks describe a platform signal at a point in time. They do not establish identity, ownership, consent or guaranteed message delivery.
Unknown stays unknown
When a product cannot give a clear answer we report unknown instead of guessing, and a single unknown check is not charged. Do not treat unknown as not registered.
Keep contact data protected
Use your signed-in account for lists and results. Store API keys on your server and share only the minimum information needed for support.
Review with context
Keep each product outcome and unknown state. Combine signals with your own records and review process before making contact decisions.
Retention and deletion
Your checks and bulk results stay in your account so you can review and download them. Ask support to review or delete data; we keep only the records needed for security, payments and legal obligations.
PrivacyQuestions about data or a result?
Contact support with a task ID and a description of your request. Do not send full contact lists or credentials by email.
ContactNumDetect is an independent service. Platform names identify the checks offered; they do not imply endorsement or affiliation.
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