CheckNumber.AI
WhatsApp Real-time Checker
ws$1 per 10,000 checks
- Core data available
- Submitted number and WhatsApp registration status
- Best for
- Registration filtering and list cleaning
No-code CSV REST API Exportable results
Bulk WhatsApp Number Checker for CSV & API
Upload E.164 phone-number lists or use the API, choose the WhatsApp result depth you need, and export one structured result for every submitted number.
No account, number, or SIM required — Every check runs through official platform APIs on our own infrastructure. You never connect, bind, or use your own account, phone number, or SIM card — just upload your list or call the API and get results.
Choose from three WhatsApp task types: registration, activity and Business signals, or optional profile-photo attributes. Upload E.164 phone numbers by CSV or API, then export each result against its original input row.
E.164
Phone input
From $1
Per 10,000 checks
CSV + API
Workflow
Submitted number +1415••••0100
Registration status yes / no
Activity recency time / days
Business status yes / no
Profile data when available
WhatsApp Real-time Checker WhatsApp Days Checker WhatsApp Age & Gender CheckerNo account, number, or SIM required
Every check runs through official platform APIs on our own infrastructure. You never connect, bind, or use your own account, phone number, or SIM card — just upload your list or call the API and get results.
What CheckNumber detects for WhatsApp
Registration status
Confirms whether the phone number has a registered WhatsApp account (yes or no), so you can filter out unregistered numbers before outreach.
Activity duration
Returns how many days the WhatsApp account has been active, helping you gauge how established and live the user is.
WhatsApp Business account
Flags whether the number is a WhatsApp Business account, so you can separate businesses from personal users.
Account signature
Returns the account's public signature or about text when set, an extra context and matching signal.
Profile photo
Returns the public WhatsApp profile photo URL when available. Automated analysis may provide the probabilistic visual estimates described below.
Photo attributes
From an available public profile photo, provides probabilistic age-range and gender estimates plus a picture-type classification such as portrait, pet, or object.
What You Can Check
Choose the WhatsApp result depth you need
Each task accepts E.164 phone numbers but returns a different level of data. Start with the narrowest result that supports your workflow.
WhatsApp Days Checker
ws_active$1.8 per 10,000 checks
- Core data available
- Activity duration, Business status, and signature
- Best for
- Account segmentation and operational review
WhatsApp Age & Gender Checker
ws_avatar$3.8 per 10,000 checks
- Core data available
- Registration, avatar URL, and available probabilistic profile attributes
- Best for
- Authorised profile-enrichment workflows
| Product | Task type | Input | Core data available | Best for | Current price |
|---|---|---|---|---|---|
WhatsApp Real-time Checker API documentation | ws | Phone numbers in E.164 format | Submitted number and WhatsApp registration status | Registration filtering and list cleaning | $1 per 10,000 checks |
WhatsApp Days Checker API documentation | ws_active | Phone numbers in E.164 format | Activity duration, Business status, and signature | Account segmentation and operational review | $1.8 per 10,000 checks |
WhatsApp Age & Gender Checker API documentation | ws_avatar | Phone numbers in E.164 format | Registration, avatar URL, and available probabilistic profile attributes | Authorised profile-enrichment workflows | $3.8 per 10,000 checks |
Core WhatsApp data
Core data available by task type
These are the main data categories users can receive from each WhatsApp product. Exact response keys and casing remain in the API documentation.
Registration check
ws- Submitted number
- The phone number supplied for the check.
- Registration status
- Whether the number returns an active WhatsApp account result.
Activity check
ws_active- Account activity
- Available activity time and active-days information.
- Business status
- Whether the result is associated with an active WhatsApp Business account.
- Profile signature
- The available account signature or about text.
Profile check
ws_avatar- Public avatar
- The available WhatsApp profile-photo URL.
- Age and gender estimates
- Probabilistic attributes derived from an available public profile photo.
- Picture attributes
- Available picture type, hair-colour, and skin-tone estimates.
Optional fields can be empty, and image-derived attributes are estimates rather than verified facts. Use only data you are authorised to process and do not treat a WhatsApp result as proof of identity, consent, or permission to contact a person.
Run a WhatsApp batch in three steps
The no-code platform and API support the same product choices. Pick the interface that fits your volume and operational workflow.
- 1
Prepare E.164 numbers
Provide one international phone number per row with a leading plus sign and country code.
- 2
Select a task type
Choose registration, activity, or profile output according to the minimum data your workflow needs.
- 3
Export mapped results
Download the completed result file or retrieve task status through the API and match each result to its input number.
Common Use Case
Improve WhatsApp list quality before outreach
De-duplicate contact lists, target Business accounts, or personalize outreach before you message.
No-code CSV REST API Exportable results
Signal 1
Registration check — confirm in bulk whether each number has a registered WhatsApp account.
Signal 2
Activity and business — see the account activity duration in days, whether it is a WhatsApp Business account, and the account signature.
Signal 3
Automated image analysis — when a public avatar is available, the model may provide probabilistic age-range, gender, and picture-type estimates.
WhatsApp FAQ
Can I check phone numbers on WhatsApp in bulk?
Yes. Upload a CSV of up to hundreds of thousands of numbers or call the REST API, choose the task type you need, then download a result file with a registration verdict for every number. You are billed only for successful checks.
Does checking a number send a WhatsApp message or notify the person?
No. The check is passive and reads registration and public profile signals only. Nothing is sent to the number, and the account owner is never messaged or notified.
Can I tell WhatsApp Business accounts from personal ones?
Yes. The activity task type returns a WhatsApp Business flag alongside the account activity duration and public signature, so you can segment businesses from individual users.
Is there a free trial for the WhatsApp checker?
Yes. New accounts receive 1,000 free checks on signup with no credit card, and every WhatsApp check is pay-as-you-go with no monthly fee, and the credits you top up never expire.
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