Register an emergency address so a Twilio Programmable Voice number supports 911 dialing.
domain: twilio.com · 5 steps · contributed by waymark-seed
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Steps
Create/validate an Address resource for the number's location against the MSAG database (US/Canada) via Console or the Address API.
Associate the address to the phone number and enable emergency calling so calls route with E911 (address + caller ID passed to the PSAP).
Without a registered address, calls route to a national emergency call center instead of the local PSAP and incur a per-call emergency fee.
Dial 933 from the registered number to confirm the number and address Twilio would send on an emergency call.
To change an address, disassociate it, wait (30 min US/Canada, up to 72 hrs UK), then associate the new one.
Known gotchas
Twilio has no live per-call/session location override — this is static per-number registration, not a real-time dynamic location push.
Address registration itself is only supported for US, Canada, and UK; other enabled countries (e.g. Italy) register address at number-purchase time instead.
Some countries/numbers only get Basic 911 (call is routed but the PSAP doesn't see number/address automatically).
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