Syria (SY)

Locale name

Syria

ISO code
The International Organization for Standardization two character representation for the given locale.

SY

Region

Middle East & Africa

Mobile country code
A three digit code associated with the given locale and used in conjunction with a Mobile Network Code to uniquely identify mobile networks.

417

Dialing code
The dialing prefix used to establish a call or send an SMS from one locale to the given locale.

+963

Two-way SMS supported
Whether Twilio supports two-way SMS in the given locale.

No

Number portability available
Whether number portability is available in the given locale.

No

Twilio concatenated message support
Concatenation refers to the capability of splitting a message that is too long to be sent in one SMS into smaller pieces and then joining the pieces at the receiving end so that the receiver sees the message as one. 

Yes*
For certain sender ID types this may not be supported. Where messages are split and rejoined may vary based on character encoding.

Message length
How many characters can be sent given a particular message encoding before the message will be split into concatenated segments.

-----

Twilio MMS support
Multimedia Messaging Service (MMS) provides a standards-based means to send pictures and video to mobile phones.

Converted to SMS with embedded URL

Sending SMS to landline numbers
How Twilio handles an SMS message destined for landline telephone number.

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
Twilio strongly encourages customers to review proposed use cases with qualified legal counsel to make sure that they comply with all applicable laws. This table lists some general best practices.

Notice: Discontinuation of SMS Delivery to Syria
In compliance with applicable regulations and requirements, and to reinforce our commitment as a trusted partner for our customer communication needs, Twilio will stop supporting SMS message delivery to Syria effective September 15, 2025.

We strongly encourage customers to discontinue sending SMS traffic to Syria through Twilio before this date to avoid delivery failures. After September 15, 2025 onward, all SMS messages to Syria will be blocked by Twilio.

All traffic will be overwritten with numeric Sender IDs to ensure delivery. The current political situation in Syria has left the telecommunications infrastructure in extreme disrepair. Message delivery rates in Syria are poor. Person-to-person (P2P) traffic is not permitted on our routes to Syria.

Political and religious content is strictly prohibited in Syria, and only OTP and Banking SMS Traffic is currently allowed.

Operator network capability
Whether mobile operators in the given country support the feature.

Required

Not Supported

Twilio supported
Whether Twilio supports the feature for the given country.

Not Supported

Supported
Learn more

Sender ID preserved
In some countries sender IDs for certain sender types are not preserved and are changed for compliance and/or deliverability reasons. In these countries mobile subscribers will see a different ‘from sender ID’ than the one sent by you.

Not Supported

Not Supported

Provisioning time
Provisioning is the process of getting the sender ID approved and registered with mobile networks (depending on country requirements). Provisioning time is how long this process takes in the given country.

N/A

N/A

UCS-2 support

Supported

Supported

Use case restrictions

In Syria, the Syriatel network requires Sender ID registration, which Twilio does not support. As a result, delivery to Syriatel is provided on a best-effort basis only.

For the MTN network, dynamic Sender ID and registration are not supported. All sender IDs are overwritten with a random long code.

In Syria, the Syriatel network requires Sender ID registration, which Twilio does not support. As a result, delivery to Syriatel is provided on a best-effort basis only.

For the MTN network, dynamic Sender ID and registration are not supported. All sender IDs are overwritten with a random long code.

Best practices

N/A

N/A

Operator network capability
Whether mobile operators in the given country support the feature.

Not Supported

Not Supported

Not Supported

Twilio supported
Whether Twilio supports the feature for the given country.

Not Supported

Supported

Not Supported

Sender ID preserved
In some countries sender IDs for certain sender types are not preserved and are changed for compliance and/or deliverability reasons. In these countries mobile subscribers will see a different ‘from sender ID’ than the one sent by you.

N/A

Not Supported

N/A

Provisioning time
Provisioning is the process of getting the sender ID approved and registered with mobile networks (depending on country requirements). Provisioning time is how long this process takes in the given country.

N/A

N/A

N/A

UCS-2 support

N/A

Supported

N/A

Use case restrictions

N/A

In Syria, the Syriatel network requires Sender ID registration, which Twilio does not support. As a result, delivery to Syriatel is provided on a best-effort basis only.

For the MTN network, dynamic Sender ID, long code, and registration are not supported. All sender IDs are overwritten with a random long code.

N/A

Best practices

N/A

N/A

N/A