REST API: Outgoing Caller IDs

An OutgoingCallerId instance resource represents a single verified number that may be used as a caller ID when making outgoing calls via the REST API and within the TwiML <Dial> verb. The OutgoingCallerIds list resource represents the set of an account's verified phone numbers.

OutgoingCallerId Instance Resource

Resource URI

/2010-04-01/Accounts/{AccountSid}/OutgoingCallerIds/{OutgoingCallerIdSid}

Resource Properties

PropertyDescription
SidA 34 character string that uniquely identifies this resource.
DateCreatedThe date that this resource was created, given in RFC 2822 format.
DateUpdatedThe date that this resource was last updated, given in RFC 2822 format.
FriendlyNameA human readable descriptive text for this resource, up to 64 characters long. By default, the FriendlyName is a nicely formatted version of the phone number.
AccountSidThe unique id of the Account responsible for this Caller Id.
PhoneNumberThe incoming phone number. Formatted with a '+' and country code e.g., +16175551212 (E.164 format).
UriThe URI for this resource, relative to https://api.twilio.com.

HTTP GET

Example

HTTP POST or PUT

Updates the caller id, and returns the updated resource if successful.

Optional Parameters

There is only one field that you may update:

ParameterDescription
FriendlyNameA human readable description of a Caller ID, with maximum length of 64 characters. Defaults to a nicely formatted version of the phone number.
Example

The response format is identical to the HTTP GET response documented above.

HTTP DELETE

Deletes the caller ID from the account. Returns an HTTP 204 response if successful, with no body.

OutgoingCallerIds List Resource

Resource URI

/2010-04-01/Accounts/{AccountSid}/OutgoingCallerIds

HTTP GET

Returns a list of OutgoingCallerId resource representations, each representing a Caller ID number valid for an account. The list includes paging information.

List Filters

The following GET query string parameters allow you to limit the list returned. Note, parameters are case-sensitive:

ParameterDescription
PhoneNumberOnly show the caller id resource that exactly matches this phone number.
FriendlyNameOnly show the caller id resource that exactly matches this name.
Example 1

Just grab the entire list of an account's caller IDs.

Example 2

Only show the caller id record for phone number (415) 867-5309.

HTTP POST

Adds a new CallerID to your account. After making this request, Twilio will return to you a validation code and Twilio will dial the phone number given to perform validation. The code returned must be entered via the phone before the CallerID will be added to your account. The following parameters are accepted:

Required Parameters
ParameterDescription
PhoneNumberThe phone number to verify. Should be formatted with a '+' and country code e.g., +16175551212 (E.164 format). Twilio will also accept unformatted US numbers e.g., (415) 555-1212, 415-555-1212.
Optional Parameters
ParameterDescription
FriendlyNameA human readable description for the new caller ID with maximum length 64 characters. Defaults to a nicely formatted version of the number.
CallDelayThe number of seconds, between 0 and 60, to delay before initiating the verification call. Defaults to 0.
ExtensionDigits to dial after connecting the verification call.
StatusCallbackA URL that Twilio will request when the verification call ends to notify your app if the verification process was successful or not. See StatusCallback parameter below.
StatusCallbackMethodThe HTTP method Twilio should use when requesting the above URL. Defaults to POST.

This will create a new CallerID validation request within Twilio, which initiates a call to the phone number provided and listens for a validation code. The validation request is represented in the response by the following properties:

Response Properties
PropertyDescription
AccountSidThe unique id of the Account to which the Validation Request belongs.
PhoneNumberThe incoming phone number being validated, formatted with a '+' and country code e.g., +16175551212 (E.164 format).
FriendlyNameThe friendly name you provided, if any.
ValidationCodeThe 6 digit validation code that must be entered via the phone to validate this phone number for Caller ID.
CallSidThe unique id of the Call created for this validation attempt.
StatusCallback Parameter

After the verification call ends, Twilio will make an asynchronous HTTP request to the StatusCallback URL if you provided one in your API request. By capturing this request, you can determine when the call ended and whether or not the number called was successfully verified.

Twilio passes the same parameters to your application in its asynchronous request to the StatusCallback URL as it does in a normal status callback request. The full list of parameters and descriptions of each are in the TwiML Voice: Twilio's Request documentation.

The verification status callback request also passes these additional parameters:

ParameterDescription
VerificationStatusDescribes whether or not the person called correctly entered the validation code. Possible values are success or failed.
OutgoingCallerIdSidIf the verification process was successful, the SID value of the newly-created OutgoingCallerId resource for the verified number.
Example

Here is a typical request and response. Typically, you would present the validation code from the response to the user who is trying to verify his or her phone number. If you verify a number via the Twilio website, this is exactly what we're doing.

HTTP PUT

Not Supported.

HTTP DELETE

Not Supported.

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