Numbers you may repeat

• E.164's article states a maximum of fifteen digits.
• The SMS article states up to 160 characters.
• Bandwidth states 3.75 MB uploads, 48-hour file storage, HTTP 202, and a 24-hour webhook retry.
• Plivo's WhatsApp page states USD 1,000 per month in the US data region and ₹1,00,000 per month in the India data region.
• IANA's SIP parameters page shows Last Updated 2026-08-17. That is a registry date, not a call-quality score.

These are study notes, not vendor documentation and not legal advice. learning-only student project. https://cyphermonkeylabs.com/#contact https://github.com/CypherMonkeyLabs https://linktr.ee/cypherMonkey