Romania SMS Best Practices, Compliance, and Features

Understanding the Romania SMS Market

Market Conditions: Romania has 28.00 million cellular mobile connections as of January 2024 (141.9% penetration rate, DataReportal 2024). Three major operators dominate: Orange (market leader), Vodafone, and Telekom Romania. OTT messaging apps like WhatsApp and Facebook Messenger handle personal communication, but SMS remains critical for business messaging, two-factor authentication, and transactional notifications. Internet penetration stands at 91.6% (18.06 million users) as of January 2024, supporting robust digital messaging infrastructure.

Mobile Network Codes (MNC): Romanian carriers use the following MCC/MNC combinations (ITU E.212):

• Orange Romania: MCC 226, MNC 10
• Vodafone Romania: MCC 226, MNC 01
• Telekom Romania Mobile: MCC 226, MNC 03
• Digi.Mobil (RCS & RDS): MCC 226, MNC 05

What Makes Romanian SMS Market Unique: Romania enforces strict URL filtering and sender ID registration requirements, especially for Telekom Romania (MNC 03). As of January 15, 2025, Telekom Romania blocks unregistered alphanumeric sender IDs (Twilio Guidelines). Romanian carriers require pre-registration and whitelisting of all URLs in SMS content, making Romania one of Europe's most regulated SMS markets for content filtering. For broader European context, see our SMS guides for other EU countries.

SMS Features and Technical Capabilities in Romania

When sending SMS to Romania, you'll find support for concatenated messages and alphanumeric sender IDs, though two-way SMS is limited and MMS converts to SMS with URL links.

Two-way SMS Support

Standard API providers don't support two-way SMS in Romania. To enable two-way communication, work directly with local carriers (Orange, Vodafone, or Telekom Romania) or use dedicated short codes.

Alternatives and Workarounds:

• Request dedicated short codes through carriers (4–6 weeks provisioning time)
• Implement alternative channels (WhatsApp Business API, web-based messaging)
• Use unique identifiers in outbound SMS with web callback URLs
• Consider hybrid approaches: send SMS with link to secure two-way web portal

Concatenated Messages (Segmented SMS)

Support: Yes, most Romanian carriers support concatenation (support varies by sender ID type). Message length rules: GSM-7 encoding allows 160 characters per segment; UCS-2 encoding allows 70 characters per segment. Encoding considerations: GSM-7 (standard Latin alphabet) supports up to 160 characters. UCS-2 (special characters and Unicode) limits messages to 70 characters before splitting.

Technical Details: When messages exceed single-segment limits, concatenation headers consume 7 characters (UDH – User Data Header), reducing usable characters to 153 per segment for GSM-7 or 67 per segment for UCS-2. Romanian diacritical marks (ă, â, î, ș, ț) require UCS-2 encoding.

MMS Support

Romania doesn't support MMS directly. MMS content automatically converts to SMS with an embedded URL link where recipients view the multimedia content. This ensures compatibility across all devices while maintaining delivery reliability.

How URL Links Work: When MMS converts, recipients receive an SMS containing a secure HTTPS link. Clicking the link opens the multimedia content in their mobile browser. Links typically expire after 30 days. Recipients may incur data charges when viewing content, so notify users in the message text (e.g., "View image: [link] – data rates may apply").

Recipient Phone Number Compatibility

Number Portability

Romania supports number portability, allowing users to keep phone numbers when switching carriers. This feature doesn't affect SMS delivery or routing – the messaging infrastructure automatically handles ported numbers.

Practical Implications: Message routing automatically detects the current carrier for ported numbers, ensuring delivery even if your database shows an outdated carrier. You don't need special API parameters or sender ID modifications. Delivery rates and latency remain consistent for ported numbers.

Sending SMS to Landlines

Romania doesn't support sending SMS to landline numbers. Attempts result in a 400 response error (code 21614). These messages won't appear in logs and you won't be charged for failed attempts.

Romania SMS Compliance: ANCOM Regulations and GDPR Requirements

ANCOM (National Authority for Management and Regulation in Communications) regulates SMS communications in Romania. You must comply with both local telecommunications laws and GDPR requirements. The Romanian Data Protection Authority (ANSPDCP) oversees data privacy compliance for SMS marketing.

GDPR Penalties and Enforcement

GDPR violations in Romania can result in fines up to €20 million or 4% of annual global turnover, whichever is greater. ANSPDCP actively enforces SMS marketing compliance:

Recent Enforcement Examples:

• December 2024: English Home fined RON 24,880 (€5,000) for direct marketing violations (DataGuidance)
• April 2025: Dante International fined RON 49,770 (€10,000) for failure to delete personal data and unauthorized processing
• Common violations: lack of consent documentation, failure to honor opt-out requests, inadequate record-keeping

Consent and Opt-In

You must obtain explicit consent before sending marketing or promotional SMS. Best practices for obtaining and documenting consent:

• Collect written or electronic consent with clear terms of use
• Maintain detailed records of when and how you obtained consent (timestamp, IP address, consent method)
• Specify the exact purpose and frequency of messages
• Provide clear information about how you'll use personal data
• Allow users to modify their preferences at any time
• Separate consent for SMS from other marketing channels

HELP/STOP and Other Commands

• Required Keywords: STOP, DEZABONARE (unsubscribe), and AJUTOR (help) must be supported
• Language Requirements: Commands must be recognized in both Romanian and English
• Response Time: Send acknowledgment messages within 24 hours
• Cost: Stop and help messages must be free for end users

Technical Implementation:

// Example opt-out handler
function handleInboundSMS(from: string, body: string) {
  const optOutKeywords = ['STOP', 'DEZABONARE', 'UNSUBSCRIBE'];
  const helpKeywords = ['HELP', 'AJUTOR'];

  const normalizedBody = body.trim().toUpperCase();

  if (optOutKeywords.some(kw => normalizedBody.includes(kw))) {
    // Add to suppression list
    addToSuppressionList(from);
    // Send confirmation (must be free)
    sendSMS(from, 'Ați fost dezabonat. Nu veți mai primi mesaje. / You have been unsubscribed.');
    return;
  }

  if (helpKeywords.some(kw => normalizedBody.includes(kw))) {
    sendSMS(from, 'Pentru asistență: contact@company.com / For help: contact@company.com');
  }
}

Do Not Call / Do Not Disturb Registries

Romania doesn't maintain a centralized Do Not Call registry. However, you must:

• Maintain your own suppression lists
• Honor opt-out requests within 24 hours
• Document all opt-out requests for compliance purposes
• Regularly clean contact lists to remove unsubscribed numbers

Time Zone Sensitivity

Romania observes Eastern European Time (EET, UTC+2) and Eastern European Summer Time (EEST, UTC+3). DST transitions occur on the last Sunday in March (forward) and last Sunday in October (backward). No strict legal time restrictions exist for SMS sending, but follow these best practices:

• Send messages between 9:00 AM and 8:00 PM local time
• Avoid messages on Sundays and national holidays
• Send urgent messages (like authentication codes) outside these hours only

SMS Sender ID Options for Romania: Alphanumeric, Short Codes & Long Codes

Alphanumeric Sender ID

Operator network capability: Partially supported Registration requirements: Pre-registration required for Telekom Romania (free); optional for Orange, Vodafone, Digi (paid registration available) Sender ID preservation: Preserved when registered; may be overwritten with generic short code (e.g., "1762") for unregistered IDs

Registration Process and Pricing (Twilio, BulkGate):

1. Free Registration (Telekom Romania only – MNC 03):

   • Submit brand/label usage agreement
   • Processing time: 1–3 business days
   • Required from January 15, 2025 for Telekom Romania
   • Documents: signed letter of authorization (LOA) by CEO

2. Standard Registration (All Networks):

   • One-time setup fee: $760 USD (via Twilio) or €100–€220 (carrier-specific)
   • Carrier breakdown: Orange €100, Digi €70, Vodafone €50
   • Processing time: 3–4 weeks
   • Required documents: LOAs for each carrier, trademark/label agreements
   • Important: Spaces not allowed in alphanumeric sender IDs for Romania

3. URL Whitelisting (required if SMS contains URLs):

   • Must be combined with sender ID registration
   • All URLs must be pre-registered with carriers
   • URL shorteners generally not permitted unless specifically whitelisted
   • Sample message content required during registration

Registration Contact Points:

• Work through your SMS API provider (Twilio, Plivo, Sinch, etc.)
• Providers handle carrier liaison and documentation
• Direct carrier registration: contact Orange, Vodafone, Telekom business departments

Long Codes

Domestic vs. International: Domestic long codes not supported; international long codes supported Sender ID preservation: No, international long codes may be overwritten Provisioning time: N/A Use cases: Not recommended due to limited support and sender ID preservation issues. As of November 20, 2024, Telekom Romania doesn't support numeric sender IDs.

Short Codes

Support: Available through local carriers Provisioning time: 4–6 weeks Use cases: Ideal for high-volume messaging, marketing campaigns, and two-factor authentication Pricing: Contact carriers directly for pricing; typically involves monthly fees and per-message costs

Restricted Content and Industries for SMS in Romania

Restricted Industries and Content (per Romanian Law 365/2002 on electronic commerce and ANCOM regulations):

• Gambling and betting services (requires gaming license from ONJN)
• Adult content or services
• Cryptocurrency and high-risk investments
• Prescription medications and certain healthcare services
• Political campaign messages without proper authorization

Legal References:

• Law 506/2004 on personal data processing
• Law 365/2002 on electronic commerce services
• GDPR (Regulation EU 2016/679) – directly applicable
• ANCOM Decision 70/2024 on network security

Consequences for Violations: Carriers block non-compliant content. ANSPDCP imposes fines of €10,000–€20 million for GDPR violations. ANCOM suspends service for telecommunications law violations. Repeated violations result in permanent blacklisting of sender IDs.

Content Filtering

Known Carrier Filtering Rules:

• URLs must be pre-registered and whitelisted
• Messages containing unregistered URLs may be blocked
• Excessive punctuation or special characters may trigger spam filters
• Gambling-related keywords automatically filtered without proper authorization

Best Practices to Avoid Filtering:

• Register all URLs with carriers before use (through sender ID registration process)
• Use registered alphanumeric sender IDs
• Avoid URL shorteners unless specifically approved
• Keep message content clear and professional
• Test messages across all carriers before launching large campaigns
• Provide sample content during sender ID registration

SMS Best Practices: Optimizing Delivery and Engagement in Romania

Messaging Strategy

• Keep messages under 160 characters when possible to avoid concatenation costs
• Include clear calls-to-action
• Personalize messages using recipient's name or relevant details
• Avoid excessive capitalization and special characters
• Always include opt-out instructions in marketing messages

Sending Frequency and Timing

• Limit marketing messages to 2–4 per month per recipient (based on GDPR best practices and user fatigue studies)
• Space messages at least 24 hours apart to avoid overwhelming recipients
• Respect Romanian holidays: January 1–2, Easter Monday, May 1, December 1, December 25–26
• Monitor engagement rates to optimize sending times
• Transactional and OTP messages are exempt from frequency limits

Localization

• Use Romanian as the primary language for domestic audiences
• Consider bilingual messages (Romanian/English) for international businesses
• Use proper diacritical marks in Romanian text: ă, â, î, ș, ț
• Ensure proper character encoding (UCS-2) for special characters
• Romanian text examples: "Mulțumim pentru comandă" (Thank you for your order)

Opt-Out Management

• Include clear opt-out instructions in every marketing message
• Example: "Răspundeți STOP pentru dezabonare / Reply STOP to unsubscribe"
• Process opt-outs within 24 hours (GDPR requirement)
• Maintain detailed opt-out records with timestamps
• Regularly audit opt-out lists for compliance (quarterly recommended)

Testing and Monitoring

• Test messages across all major Romanian carriers (Orange, Vodafone, Telekom, Digi)
• Monitor delivery rates by carrier to identify issues
• Track engagement metrics: delivery rate, click-through rate, opt-out rate
• Regularly test opt-out functionality across carriers
• Set up delivery status callbacks for real-time monitoring

SMS API Integration Guide: Twilio, Sinch, MessageBird & Plivo for Romania

Twilio SMS API for Romania

Twilio provides comprehensive SMS API support for sending messages to Romania. For other SMS providers, see our guides on Infobip SMS integration, MessageBird SMS, and Plivo SMS. Authenticate using your account SID and auth token.

import { Twilio } from 'twilio';

// Initialize Twilio client with your credentials
const client = new Twilio(
  process.env.TWILIO_ACCOUNT_SID,
  process.env.TWILIO_AUTH_TOKEN
);

async function sendSmsToRomania() {
  try {
    // Send message with registered alphanumeric sender ID
    const message = await client.messages.create({
      body: 'Mesajul dvs. a fost trimis cu succes!', // Your message in Romanian
      from: 'YourBrand', // Your registered alphanumeric sender ID
      to: '+40721234567', // Romanian number in E.164 format
      // Optional: Set statusCallback for delivery tracking
      statusCallback: 'https://your-webhook.com/status'
    });

    console.log(`Message sent successfully! SID: ${message.sid}`);
  } catch (error) {
    console.error('Error sending message:', error);
  }
}

Common Error Codes:

• 21614: Cannot send to landline number
• 21408: Permission to send not enabled for region
• 30003: Unreachable destination
• 30005: Unknown destination (invalid number format)

Sinch

Sinch offers a REST API for SMS delivery to Romania. Authenticate using an API token.

import axios from 'axios';

async function sendSinchSms() {
  const API_TOKEN = 'your_api_token';
  const SERVICE_PLAN_ID = 'your_service_plan_id';

  try {
    const response = await axios.post(
      `https://sms.api.sinch.com/xms/v1/${SERVICE_PLAN_ID}/batches`,
      {
        from: 'YourBrand', // Registered sender ID
        to: ['+40721234567'],
        body: 'Your message content',
        // Optional: Enable delivery reports
        delivery_report: 'summary'
      },
      {
        headers: {
          'Authorization': `Bearer ${API_TOKEN}`,
          'Content-Type': 'application/json'
        }
      }
    );

    console.log('Message sent:', response.data.id);
  } catch (error) {
    console.error('Sending failed:', error.response?.data);
  }
}

MessageBird

MessageBird provides a straightforward API for sending SMS to Romania with delivery reporting support.

import messagebird from 'messagebird';

const messageBirdClient = messagebird('YOUR_ACCESS_KEY');

function sendMessageBirdSms() {
  const params = {
    originator: 'YourBrand', // Registered sender ID
    recipients: ['+40721234567'],
    body: 'Your message content',
    // Optional parameters for delivery tracking
    reportUrl: 'https://your-webhook.com/status',
    type: 'flash' // For urgent messages
  };

  messageBirdClient.messages.create(params, (err, response) => {
    if (err) {
      console.error('Error:', err);
      return;
    }
    console.log('Message sent:', response.id);
  });
}

Plivo

Plivo's API offers reliable SMS delivery to Romania with detailed delivery tracking.

import plivo from 'plivo';

const client = new plivo.Client(
  'PLIVO_AUTH_ID',
  'PLIVO_AUTH_TOKEN'
);

async function sendPlivoSms() {
  try {
    const message = await client.messages.create({
      src: 'YourBrand', // Your registered sender ID
      dst: '40721234567', // Romanian number without '+' prefix
      text: 'Your message content',
      // Optional parameters
      url: 'https://your-webhook.com/status', // Delivery report URL
      method: 'POST' // Webhook method
    });

    console.log('Message sent:', message.messageUuid);
  } catch (error) {
    console.error('Sending failed:', error);
  }
}

API Rate Limits and Throughput

• Rate Limits by Provider:

  • Twilio: 1 message/second (standard), customizable for enterprise
  • Sinch: 10 messages/second (default), up to 100/s for enterprise
  • MessageBird: 10 messages/second (standard tier)
  • Plivo: 5 messages/second (default), scalable to 100+/s
  • Consider implementing exponential backoff for retry logic

• Large-Scale Sending Strategies:

  typescript

  // Example batch sending implementation
  async function sendBatchMessages(numbers: string[], message: string) {
    const BATCH_SIZE = 50;
    const DELAY_MS = 1000;
  
    for (let i = 0; i < numbers.length; i += BATCH_SIZE) {
      const batch = numbers.slice(i_ i + BATCH_SIZE);
      await Promise.all(batch.map(number => sendSms(number, message)));
      await new Promise(resolve => setTimeout(resolve, DELAY_MS));
    }
  }
  

Error Handling and Reporting

Common Error Codes Across Providers:

// Example error handling implementation
interface SmsError {
  code: string;
  message: string;
  timestamp: Date;
}

class SmsErrorHandler {
  private errors: SmsError[] = [];

  logError(error: any) {
    const smsError: SmsError = {
      code: error.code || 'UNKNOWN',
      message: error.message,
      timestamp: new Date()
    };

    this.errors.push(smsError);
    // Implement your logging logic here
    console.error(`SMS Error [${smsError.code}]:`, smsError.message);
  }

  async retryFailedMessages() {
    // Implement retry logic with exponential backoff
  }
}

Recap and Additional Resources

Key Takeaways

1. Compliance Priorities:

   • Register alphanumeric sender IDs (mandatory for Telekom from Jan 2025)
   • Obtain explicit GDPR consent and maintain documentation
   • Honor opt-out requests within 24 hours
   • Whitelist all URLs before sending

2. Technical Best Practices:

   • Use registered sender IDs to avoid "1762" replacement
   • Implement proper error handling with retry logic
   • Monitor delivery rates by carrier (target >95%)
   • Test across all carriers before campaigns

3. Next Steps:

   • Review ANCOM regulations and GDPR requirements
   • Initiate sender ID registration through your SMS provider
   • Implement consent management system with audit trail
   • Set up delivery monitoring and alerting

Additional Resources

Official Resources:

• ANCOM (Romanian Telecom Regulator): www.ancom.ro/en
• Romanian Data Protection Authority: www.dataprotection.ro
• GDPR Official Text: eur-lex.europa.eu

Industry Guidelines:

• Mobile Operators Association of Romania: Contact through individual carriers
• European Electronic Communications Code (EECC) Guidelines

Carrier Registration Portals (access through SMS providers):

• Orange Romania Business: Register via API provider (Twilio, Plivo, etc.)
• Vodafone Romania: Contact through SMS aggregator
• Telekom Romania: Free registration via provider starting 2025

Technical Documentation:

• Twilio Romanian SMS Guidelines
• Twilio Sender ID Registration
• Sinch API Documentation
• MessageBird Integration Guide
• Plivo Developer Resources

FAQ

Do I need to register alphanumeric sender IDs in Romania?

Yes, pre-registration is required for Telekom Romania (mandatory from January 15, 2025) and strongly recommended for Orange, Vodafone, and Digi. Without registration, your alphanumeric sender ID may be replaced with a generic short code like "1762". Registration typically takes 1–3 business days for Telekom Romania (free) or 3–4 weeks for all-network registration ($760 USD or €220 total). Contact your SMS provider to initiate the sender ID registration process with Romanian carriers. Include URL whitelisting if your messages contain links.

Is GDPR consent required for SMS marketing in Romania?

Yes, GDPR and Romanian law require explicit consent before sending any marketing or promotional SMS. You must obtain written or electronic consent with clear terms, maintain detailed records of when and how you obtained consent (including timestamps and IP addresses), specify message purpose and frequency, and provide easy opt-out mechanisms. The Romanian Data Protection Authority (ANSPDCP) enforces these requirements with fines ranging from €4,000 to €20 million or 4% of global annual turnover for violations. Recent 2024–2025 enforcement actions show active monitoring of SMS marketing compliance.

What are the supported opt-out keywords in Romania?

Romanian regulations require support for both Romanian and English opt-out commands: STOP and DEZABONARE (unsubscribe) for opting out, AJUTOR and HELP for assistance. Send acknowledgment messages within 24 hours, and complete opt-out processing within 24 hours. Stop and help messages must be free for end users. Implement keyword detection in your SMS receiving webhook to automatically process these commands and maintain a suppression list.

Can I send SMS to landline numbers in Romania?

No, Romania doesn't support sending SMS to landline numbers. Attempts result in a 400 error response (code 21614). These failed messages won't appear in logs and you won't be charged. Validate phone numbers against mobile number ranges before sending to avoid delivery failures. Romanian mobile numbers typically start with prefixes like 72, 73, 74, 75, 76, 77, 78, and 79.

What is the maximum SMS message length for Romania?

GSM-7 encoding allows 160 characters per segment. Unicode/UCS-2 encoding (required for Romanian diacritics ă, â, î, ș, ț) allows 70 characters per segment. Concatenated messages are supported across most carriers, allowing longer messages to be split into multiple segments. When concatenated, usable characters reduce to 153 per segment (GSM-7) or 67 per segment (UCS-2) due to 7-character concatenation headers. For best deliverability and cost efficiency, keep marketing messages under 160 characters when possible.

Is two-way SMS supported in Romania?

Standard API providers don't support two-way SMS in Romania. To enable two-way communication, work directly with local carriers Orange, Vodafone, or Telekom Romania, or use dedicated short codes with specific setup requirements. Short code provisioning takes 4–6 weeks and requires agreements with individual carriers. Alternative approaches include using web-based callbacks with unique identifiers in SMS or implementing WhatsApp Business API for bidirectional messaging.

What are the SMS sending time restrictions in Romania?

Romania has no strict legal restrictions on SMS sending times, but best practices recommend sending between 9:00 AM and 8:00 PM Eastern European Time (EET/EEST, UTC+2/+3). Avoid sending marketing messages on Sundays and national holidays (January 1–2, Easter Monday, May 1, December 1, December 25–26). Send urgent messages like authentication codes (OTP) and transactional notifications outside these hours only. Following these guidelines improves engagement rates by 15–25% and reduces opt-outs.

Do Romanian carriers filter SMS content with URLs?

Yes, Romanian carriers require pre-registered and whitelisted URLs. Messages containing unregistered URLs may be blocked or filtered as spam, especially on Telekom Romania. URL shorteners (bit.ly, tinyurl, etc.) aren't approved unless specifically whitelisted. Register all URLs with carriers before use through your SMS provider during the sender ID registration process. As of November 2024, Telekom Romania requires combining URL registration with alphanumeric sender ID registration. Provide sample message content including URLs during registration.

How does number portability affect SMS delivery in Romania?

Romania fully supports number portability without affecting SMS delivery or routing. When users switch carriers while keeping their phone number, the messaging infrastructure automatically handles routing to the correct current carrier through HLR (Home Location Register) lookups. Ported numbers don't require special configuration, sender ID changes, or API parameters. Delivery rates and latency remain consistent (typically within 3–5 seconds) for ported numbers.

What are the typical SMS delivery rates in Romania?

Delivery rates in Romania typically exceed 95% when using registered sender IDs and following best practices. Factors affecting delivery include: sender ID registration status (registered IDs achieve 96–98% delivery vs. 85–90% for unregistered), compliance with carrier content filtering rules, proper phone number validation (mobile vs. landline), message timing (business hours vs. off-hours), and proper character encoding. Monitor delivery rates by carrier (Orange, Vodafone, Telekom Romania, Digi) to identify and resolve carrier-specific issues. Set up real-time alerts for delivery rates dropping below 90%.