SHAKEN/STIR Onboarding

Publisher

Twilio

URL

https://www.twilio.com/docs/voice/trusted-calling-with-shakenstir/shakenstir-onboarding

Published

unknown

Updated

unknown

Accessed

2026-10-02

HTTP status

200

License

Twilio documentation, all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• A forwarded call that presents the original caller's number is usually signed at B or lower by the forwarding provider, because that number is not one the forwarding provider assigned; keeping the original signature needs a mechanism such as RFC 8946 'div' or a vendor passthrough like Twilio's CallToken. inferred in context
• Twilio signs at A only when there is an approved Business Profile, an approved SHAKEN/STIR Trust Product linked to it, and the calling number is assigned to both; only calls from those assigned numbers are signed A. in context
• Twilio signs at B when the account has an approved Primary Business Profile and an approved SHAKEN/STIR Trust Product linked to the parent account, with no phone-number assignment needed. in context
• Twilio signs at C when the account has no approved Business Profile and SHAKEN/STIR Trust Product, or when those were rejected. in context
• For caller IDs that are not Twilio phone numbers, B is the highest attestation Twilio can give, because it cannot attest to a customer's right to use a number it does not host. in context
• Twilio Compliance Operations vets a Business Profile in about 24 hours and a SHAKEN/STIR Trust Product in about 72 hours. in context

Cite this source record

APA

WarmTransfer. (2026, October 2). SHAKEN/STIR Onboarding. WarmTransfer. https://warmtransfer.net/knowledge/sources/twilio-docs-shakenstir-onboarding

BibTeX

@misc{warmtransfer-twilio-docs-shakenstir-onboarding,
  title  = {SHAKEN/STIR Onboarding},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/twilio-docs-shakenstir-onboarding},
  note   = {Twilio, accessed 2026-10-02}
}