# Where the vendors put the same words

Study notes. Not vendor documentation and not legal advice.

- Twilio's voice docs include a page titled Trusted calling with SHAKEN/STIR, and the voice navigation lists SHAKEN/STIR overview and onboarding beside Voice Integrity.
- Bandwidth's voice page says its STIR/SHAKEN APIs are for managing regulatory compliance, in the sentence that opened.
- The same Bandwidth page says a per-query service provides the caller name on VoIP calls in the United States and Canada.
- No attestation fee, no letter-to-price table, and no certificate bundle were read on those pages.
- Caller ID spoofing remains the problem the Wikipedia article names. A vendor menu does not replace the A, B, and C definitions.

On a worksheet, pair Bandwidth's caller-name query with CNAM, and pair both vendors' STIR words with the Wikipedia letters. Leave a blank column for fees.