The term "Whatsapp contact checker" can refer to a few different things, so let's break down the possibilities:
This is a common use case, and several tools and methods exist for this:
Bellingcat's Whatsapp Phone Number Checker: As highlighted in the search results, this is a command-line tool (with a Google Colab option for online use) that uses the Whatsapp API to check if a phone number is connected to a Whatsapp account. It attempts to add the number as a contact and retrieves publicly available information if successful.
wilcode/Whatsapp -phone-number-checker (Apify Actor): This is another online tool available through the Apify platform that likely performs a similar function of checking phone number registration on Whatsapp via their API.
unnohwn/Whatsapp -checker (GitHub): This cayman islands whatsapp number data Python tool can also verify if a phone number (or username) is associated with a Whatsapp account.
CallMeBot.com: This website offers a feature to try and get the phone number from a Whatsapp User ID or username, but its success depends on the user's privacy settings.
Third-Party Services: Some online services and software (like the one mentioned on Kwork) are specifically designed for bulk checking of phone numbers to see if they are registered on Whatsapp , often used for marketing or verification purposes.
Manual Checks within Whatsapp : You can manually check if a phone number is on Whatsapp by trying to add it as a contact or searching for it within the app. However, privacy settings can limit the visibility of accounts in search results.
Key Considerations for Phone Number Checkers:
Privacy: These tools generally respect Whatsapp 's privacy settings. They won't reveal a phone number if the user has set it to be hidden.
API Requirements: Tools like Bellingcat's and unnohwn/Whatsapp -checker often require you to obtain your own Whatsapp API ID and API Hash.
Terms of Service: Be mindful of Whatsapp 's terms of service when using automated tools to avoid potential account блокировка.
Ethical Use: Use these tools responsibly and ethically.