No, it's not possible. The number needs to be visible on the screen in order for Truecaller to identify it.
Articles in this section
- Why do I need to set Truecaller as my default dialer to block calls?
- Spam call was not blocked?
- How do i disable notifications from blocked calls or messages?
- How do I unblock or whitelist a phone number?
- How do I block ’Hidden numbers’?
- How do I block a number?
- Can Truecaller identify Hidden or Private numbers?
- Where can I edit my block list?