This endpoint returns a list of phone numbers owned by the authenticated user that can be assigned to assistants, with optional filtering by assistant type. 
Query Parameters Filter phone numbers by assistant type. Options: inbound, outbound 
Response fields The unique identifier of the phone number 
The phone number in E.164 format 
The country code for the phone number 
The human-readable type label for the phone number 
Whether the phone number is available for assignment (not currently assigned to an inbound assistant) 
[   {     "id" :  45 ,     "phone_number" :  "+1234567890" ,     "country_code" :  "US" ,     "type_label" :  "Normal" ,     "is_available" :  true   },   {     "id" :  46 ,     "phone_number" :  "+1234567891" ,     "country_code" :  "US" ,     "type_label" :  "SIP" ,     "is_available" :  false   },   {     "id" :  47 ,     "phone_number" :  "+441234567890" ,     "country_code" :  "GB" ,     "type_label" :  "Caller ID" ,     "is_available" :  true   } ] Notes 
Only phone numbers owned by the authenticated user are returned 
When type=inbound is specified, caller ID numbers and already assigned numbers are filtered out 
The is_available field indicates if the number can be assigned to a new inbound assistant 
Phone numbers are returned in the values collection format (indexed array) 
Use the id field when assigning phone numbers to assistants