Emergency Calling for SIP Interfaces

Publisher

Twilio

URL

https://www.twilio.com/docs/voice/sip/emergency-calling

Published

2026-08-19

Updated

unknown

Accessed

2026-10-14

HTTP status

200

License

Twilio documentation; copyright Twilio; no-redistribution; short excerpts and locators only

Source notes citing this source

• An address that is deliverable by USPS can still fail MSAG validation, so postal validation alone is not evidence that a 911 address will provision correctly. inferred in context
• Twilio states that emergency test dialing to 933 is available only in the US and Canada. in context
• To move a Twilio number to a new emergency address, the administrator disassociates the current address, confirms the number's Emergency Address Status shows unregistered, associates the new address, and confirms it shows registered. in context
• To edit an existing Twilio emergency address, it must first be disassociated from every number using it and show unregistered, then edited, re-associated, and confirmed registered. in context
• Twilio requires a US or Canadian emergency address for its SIP interfaces to be recognized by the MSAG database. in context
• Twilio states that a US MSAG address often differs from the USPS address for the same location because the MSAG uses the community name (township, city, county) served by the responding PSAP. in context
• In the Twilio Console, if an emergency address cannot be validated after Save & Continue, the administrator is asked to pick from suggested alternative addresses, and the selected address is then associated with the chosen numbers. in context

Cite this source record

APA

WarmTransfer. (2026, August 19). Emergency Calling for SIP Interfaces. WarmTransfer. https://warmtransfer.net/knowledge/sources/twilio-docs-voice-sip-emergency-calling

BibTeX

@misc{warmtransfer-twilio-docs-voice-sip-emergency-calling,
  title  = {Emergency Calling for SIP Interfaces},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/twilio-docs-voice-sip-emergency-calling},
  note   = {Twilio, accessed 2026-10-14}
}