Locale Summary |
|
---|---|
Locale name |
Tanzania |
ISO code |
TZ |
Region |
Middle East & Africa |
Mobile country code |
640 |
Dialing code |
+255 |
Guidelines |
|
---|---|
Two-way SMS supported |
No |
Number portability available |
Yes |
Twilio concatenated message support |
Yes* |
Message length |
160 Characters |
Twilio MMS support |
Converted to SMS with embedded URL |
Sending SMS to landline numbers |
You cannot send SMS to a landline destination number: the Twilio REST API will throw a 400 response with error code 21614, the message will not appear in the logs, and the account will not be charged. |
Compliance considerations |
Sender ID Compliance Sender ID Registration is required in Tanzania for networks Tigo, Zantel, Vodacom, and Airtel . Starting on June 16, 2025, messages with unregistered Sender IDs to these networks will be blocked. To continue sending messages, you must use a registered Alphanumeric Sender ID. Twilio strongly encourages customers to review proposed use cases with qualified legal counsel to make sure that they comply with all applicable laws. The following are some general best practices: 1. Get opt-in consent from each end-user before sending any communication to them, particularly for marketing or other non-essential communications. 2. Only communicate during an end-user’s daytime hours unless it is urgent. 3. SMS campaigns should support HELP/STOP messages, and similar messages, in the end-user’s local language. 4. Do not contact end-users on do-not-call or do-not-disturb registries. |