2019: Phone number not found

No phone number matches the ID you supplied. This is an HTTP 404 error, returned when updating a line whose ID doesn’t resolve.

• Verify the phone number ID against GET /v3/phone_numbers — it is the id of the line, not the number itself
• A line that exists but belongs to another account returns 403 2005 instead, so a 404 here means the ID is genuinely unknown

• Phone Numbers
• API reference: Phone Numbers
• Error Codes