WhatsApp Web
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https://web.whatsapp.com/index.html
WhatsApp Messenger Android Information
...INTRODUCTION Welcome to WhatsApp Messenger for Android! For questions and support, please send email to: android@support.whatsapp.com When sending us bugs, please use this route inside the application: Chats > Menu > Settings > About and Help > Contact Us This will guarantee that we receive application logs along with your bug report. NOTES...
https://www.whatsapp.com/android/current/WhatsApp.html
WhatsApp
...WhatsApp is currently providing special pricing campaign service for Mobile operators, the IP pool is only available for those operators. Please note that we have migrated the latest IP pools of WhatsApp to Facebook Mobile Partner Portal and the IP pool update process has been fully automated....
https://www.whatsapp.com/cidr.txt