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Country Summary

Country nameSerbia
ISO codeRS
RegionEurope
Mobile country code220
Dialing code381

Guidelines

Two-way SMS supported No
Twilio concatenated message supportYes
Message length
Twilio MMS supportConverted to SMS with embedded URL
Sending SMS to landline numbersYou 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. 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.

Phone Numbers & Sender ID

Toll FreeLong CodeShort Code
DomesticInternationalDomesticInternational
Operator network capability --- --- --- Not SupportedNot Supported
Twilio supported --- ---
Learn more
--- SupportedNot Supported
Sender ID preserved --- --- --- No---
Provisioning time---------------
UCS-2 support---------Supported---
Use case restrictions---------

Dynamic Numeric Sender IDs are not supported by mobile operators in Serbia. Sender IDs will be overwritten with a Generic Alphanumeric Sender ID outside the Twilio platform to ensure deliverability.

---
Best practices---------------
Toll Free - Domestic
Operator network capability ---
Twilio supported ---
Sender ID preserved ---
Provisioning time---
UCS-2 support---
Use case restrictions---
Best practices---
Toll Free - International
Operator network capability ---
Twilio supported ---
Learn more
Sender ID preserved ---
Provisioning time---
UCS-2 support---
Use case restrictions---
Best practices---
Long Code - Domestic
Operator network capability ---
Twilio supported ---
Sender ID preserved ---
Provisioning time---
UCS-2 support---
Use case restrictions---
Best practices---
Long Code - International
Operator network capabilityNot Supported
Twilio supportedSupported
Sender ID preservedNo
Provisioning time---
UCS-2 supportSupported
Use case restrictions

Dynamic Numeric Sender IDs are not supported by mobile operators in Serbia. Sender IDs will be overwritten with a Generic Alphanumeric Sender ID outside the Twilio platform to ensure deliverability.

Best practices---
Short Code
Operator network capabilityNot Supported
Twilio supportedNot Supported
Sender ID preserved---
Provisioning time---
UCS-2 support---
Use case restrictions---
Best practices---
Alphanumeric - Pre-registration
Operator network capabilitySupported
Twilio supported Supported
Sender ID preservedYes
Provisioning time16 days
UCS-2 supportSupported
Use case restrictions

In Serbia, Sender ID preservation cannot be guaranteed without registration. We offer customers the option to register their Sender IDs so they can have their messages delivered with the Alphanumeric Sender IDs of their choice. This option comes with a monthly fee.

Best practices---
Alphanumeric - Dynamic
Operator network capabilitySupported
Twilio supported Supported
Learn more
Sender ID preservedYes
Provisioning time---
UCS-2 supportSupported
Use case restrictions

Dynamic Alphanumeric Sender IDs are not fully supported by the network mt:s (Telekom Srbijaand Telenor). Sender IDs may be overwritten with a generic Alphanumeric Sender ID outside the Twilio platform to ensure deliverability for this network.

Best practices---

Phone Numbers & Sender ID (continued)

Alphanumeric
Pre-registrationDynamic
Operator network capabilitySupportedSupported
Twilio supported Supported Supported
Learn more
Sender ID preservedYesYes
Provisioning time16 days---
UCS-2 supportSupportedSupported
Use case restrictions

In Serbia, Sender ID preservation cannot be guaranteed without registration. We offer customers the option to register their Sender IDs so they can have their messages delivered with the Alphanumeric Sender IDs of their choice. This option comes with a monthly fee.

Dynamic Alphanumeric Sender IDs are not fully supported by the network mt:s (Telekom Srbijaand Telenor). Sender IDs may be overwritten with a generic Alphanumeric Sender ID outside the Twilio platform to ensure deliverability for this network.

Best practices------

For the benefit of all our customers, these guidelines are provided to help you comply with applicable requirements and to help ensure Twilio's platform remains compliant with global telecommunications ecosystem requirements. These guidelines represent our current understanding of common compliance requirements generally applicable to Twilio and its customers, and do not constitute legal advice. By posting these guidelines, Twilio makes no assurances regarding the legal compliance of your application built using our APIs. You are expected to understand and abide by all compliance obligations applicable to your specific application. You should check these pages regularly for updates as telecommunications ecosystem requirements continue to evolve and change, and the information below may be updated or changed without notice.