I built a voice bot using Vapi dashboard, and connected it with an assistant overrides feature where I pass the customer details before connection of call. Customer calls my vapi number but I am getting "anonymous" as a phone number. Can you explain why this is happening, moreover, the call went smoothly but without customer infromation. Following is the call id: 019c6796-ad30-7665-9ff8-80fca583a213 https://cdn.discordapp.com/attachments/1473021423730823310/1473021424183677069/image.png?ex=6994b19a&is=6993601a&hm=fae50a078182371328f3a3a33dd67a64f574d4996693aab698f2ac8cf38362df& https://cdn.discordapp.com/attachments/1473021423730823310/1473021424451977216/image.png?ex=6994b19b&is=6993601b&hm=eb0f07787550da89f1842faaab0c9f59a8c22c2e3798a6963d3711dc7014ddb0&

their phone number was stripped at the carrier level before it reached vapi

Can you explain more?

The SIP headers show that the call arrived at Vapi already marked as “Anonymous”, including both the

From

and

P-Asserted-Identity

fields. The STIR/SHAKEN attestation also cryptographically confirms the originating number was set to

"Anonymous"

with attestation level B. This proves the caller ID was intentionally stripped upstream by the originating carrier (382com) before reaching Vapi, and Vapi has no ability to recover the original phone number. Here's some of the data:

"from": "\"Anonymous\" <sip:Anonymous@44.229.228.186:5060>;tag=tt3Nr2y0H4NyQ",
"p-asserted-identity": "\"Anonymous\" <sip:Anonymous@207.223.78.171:5060>"