By passing the reference ID for a transaction in the body of your request, you can receive a response containing details about that transaction.

  • Can be authenticated with Basic (easiest to implement) and Digest
  • Use{reference_id} as the base endpoint
  • Accept only UTF-8 encoded unicode characters as inputs
  • Use Content-Type - application/x-www-form-urlencoded in request headers

Request Parameters

1 Path Parameter


Your request was fulfilled and resulted in a new resource being created. If you want to code against a response, you should retrieve the status or error code and use that rather than the HTTP status response.

Status Code Associated Text String Description
200 Delivered to handset The SMS was delivered to the end user’s phone. (Final)
203 Delivered to gateway The SMS was delivered to the gateway. If the gateway responds with further information (including successful delivery to handset or delivery failure), the status is updated. (Intermediate)
207 Error delivering SMS to handset (reason unknown) The SMS could not be delivered to the end user’s handset for an unknown reason. (Final)
210 Temporary phone error The SMS could not be delivered to the handset due to a temporary error with the phone. Examples - phone is turned off, not enough memory to store the message. (Final)
211 Permanent phone error The SMS could not be delivered to the handset due to a permanent error with the phone. For example, the phone is incompatible with SMS, or illegally registered on the network. This can happen when a phone number is blacklisted, or is incorrectly provisioned. (Final)
220 Gateway/network cannot route message The network cannot route the message to the handset. (Final)
221 Message expired before delivery The message was queued by the mobile provider and timed out before it could be delivered to the handset. (Final)
222 SMS not supported SMS is not supported by this phone, carrier, plan, or user.
230 Message blocked by TeleSign TeleSign blocks a message if it is being sent to a phone number that is on a global blocklist.
231 Invalid/unsupported The content of the message is not supported.
237 Message blocked in requested country You requested that messages in a specific country be blocked, and the message was being sent to this country.
238 Destination blocked by prefix You requested that phone numbers with a particular prefix be blocked.
250 Final status unknown The final status of the SMS cannot be determined.
286 Transaction not attempted The SMS is blocked from being sent due to the phone type not being one of the following - mobile, prepaid, personal, or pager.
290 Message in progress The message is being sent to the SMS gateway.
292 Queued by gateway The SMS gateway has queued the message.
295 Status delayed The status of the SMS is temporarily unavailable.
500 Transaction not attempted No SMS request was attempted.
502 Campaign error This error can be generated if there is a problem with the short code used.
503 Carrier rejected - temporary problem This error is generated if there is an error on the carrier or operator side that is temporary and the message can be retried.
504 Carrier rejected - permanent error This error is generated if there is an error on the carrier or operator side that is permanent and the message should not be retried.
505 Error on gateway - temporary error This error is generated if there is an error on TeleSign’s partner side that is considered temporary and the message can be retried.
506 Error on gateway - permanent error This error is generated if there is an error on TeleSign’s partner side that is considered permanent and the message should not be retried.
507 Invalid destination address There is a problem with the destination address used. Either the format is not valid, or the number is not associated with any carrier, or if MSC is used it does not know about this MSISDN.
508 Invalid source address The message requires a source address. Verify that one is provided and correct.
510 Message blocked by subscriber action or request The end user has blocked receiving SMS with their carrier plan or by request or from the particular short code used.
511 Subscriber low on credit The end user exceeded their spending limits and cannot receive SMS.
512 Roaming error End user cannot receive SMS because their device that receives the messages is roaming.
513 Mobile number portability error SMS failed because ported combinations are unreachable.
514 Subscriber absent The operator/carrier is temporarily unable to reach the end user.
515 Suspected spam This message is considered to be spam by carrier or operator.
599 Status not available The system is unable to provide status at this time.

A 32-digit hex value used to identify the web service request. The value is unique to each web service request, is randomly generated by TeleSign, and is returned in the response message immediately following the web service request.


(Optional) Indicates whether the end user’s phone number provided in the request was modified before processing by TeleSign to increase message deliverability. Contact Customer Success to enable this feature. Possible values are "True" and "False".

string or null

The customer-generated ID for this transaction that was provided in the request. If the external_id parameter was not included in the request, the value here is null.

1 validation

Contains properties relevant when the message sent with this transaction is one of several parts of a longer message that was split. This object only appears if this feature is enabled for your account. Contact our Customer Support Team to request this feature.

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Path Params
1 path param not set
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