# 21268: Sending to Premium rate or Information Service numbers is not allowed

Log Type: APPLICATION

Log Level: ERROR

## Description

You can't send SMS messages to premium rate or information service numbers through Twilio. Twilio classifies premium numbers as higher-cost numbers for special services, and Lookup Line Type Intelligence identifies these destinations with the `premium` line type.

### Possible causes

* The `To` number is a premium rate or information service number, which Twilio does not allow as an SMS destination.
* Your application submitted a destination number without validating its line type first. Lookup Line Type Intelligence can identify whether a number is `premium` before you send the message.
* Your application accepts user-entered or international destination numbers, which can expose your account to premium-rate fraud attempts in high-risk geographies. ([help.twilio.com](https://help.twilio.com/articles/223181108-International-SMS-Messaging-Geographic-Permissions-Geo-Permissions-and-How-They-Work))

### Possible solutions

* Send the message to a standard SMS-capable recipient number instead of a premium rate or information service number.
* Validate destination numbers before sending. Use `GET /v2/PhoneNumbers/{PhoneNumber}` with `Fields=line_type_intelligence` and reject numbers whose `line_type_intelligence.type` is `premium`.
* If your application allows broad international sending, review your SMS Geographic Permissions and block countries you do not intend to message. Twilio recommends limiting destinations to reduce exposure to premium-rate fraud. ([help.twilio.com](https://help.twilio.com/articles/223181108-International-SMS-Messaging-Geographic-Permissions-Geo-Permissions-and-How-They-Work))

#### Additional resources

* [Line Type Intelligence](/docs/lookup/v2-api/line-type-intelligence)
* [Messages resource](/docs/messaging/api/message-resource)
* [International SMS Messaging Geographic Permissions and How They Work](https://help.twilio.com/articles/223181108-International-SMS-Messaging-Geographic-Permissions-Geo-Permissions-and-How-They-Work)