A: If your application provisions phone numbers using the IncomingPhoneNumber API, AND your application provisions phone numbers in a country that requires an address, as outlined in the Twilio Regulatory Information Page, and your application does not provide an address SID, then your application will be impacted.
Q: Do I need to provide an address SID for all phone numbers when using the IncomingPhoneNumber API after September 10th?
A: No, an address SID is only required when provisioning a phone number in a country that requires an address, as outlined in the Twilio Regulatory Information Page.
Q: If I’m required to provide an Address SID for regulatory information, will I also be required to provide an identity SID, if it’s required for the phone number types that require it?
A: No. The change on September 10th will only require an address SID.
Q: Does this affect my existing phone numbers as well, or only new phone numbers being provisioned through the API?
A: This change only affects provisioning new phone numbers through the IncomingPhoneNumber API, and does not have any effect on your existing phone numbers.