Complete Guide to Sending SMS to Anguilla: API Integration, Compliance & Best Practices

Send SMS messages to Anguilla (+1264) successfully by understanding the local telecommunications infrastructure, regulatory requirements, and technical specifications. This comprehensive guide covers everything developers and businesses need to implement SMS messaging to Anguilla, including working API integration code for Twilio, Sinch, MessageBird, and Plivo, SMS compliance guidelines for the Caribbean region, carrier-specific delivery requirements, and proven optimization strategies for maximizing message delivery rates.

Anguilla SMS Market Overview

Market Conditions: Anguilla has a well-established mobile telecommunications infrastructure serving approximately 14,728 residents as of mid-year 2025 (UN World Population Prospects: The 2024 Revision). Two primary mobile network operators serve the market: Digicel (MCC/MNC 365 010) and FLOW (Cable & Wireless) (MCC/MNC 365 840). Both operators provide island-wide coverage using GSM and UMTS networks on 850 MHz and 1900 MHz frequencies, plus LTE on 700 MHz. While specific market share data isn't publicly available, mobile penetration is high with widespread SMS usage. The market supports both traditional SMS and over-the-top (OTT) messaging apps, though SMS remains crucial for business communications, transactional notifications, and two-factor authentication due to its reliability and universal reach.

Regulatory Authority: The Public Utilities Commission (PUC) of Anguilla regulates telecommunications services under the Telecommunications Act 2003. The PUC oversees licensing, spectrum management, numbering plans, and consumer protection for telecommunications services.

What SMS Features Are Supported in Anguilla?

Anguilla supports standard SMS features, including concatenated messaging and international SMS, though two-way messaging capabilities are limited.

Is Two-Way SMS Supported in Anguilla?

Major SMS providers do not support two-way SMS in Anguilla. You cannot receive replies to your messages through standard SMS APIs.

Technical Context: This limitation stems from carrier infrastructure constraints and SMS gateway configurations specific to the Caribbean region. For interactive communications requiring replies, consider:

• Using web-based response mechanisms (include URLs in messages)
• Implementing separate inbound channels (email, web forms)
• Monitoring alternative communication channels for customer responses

What Are the SMS Character Limits in Anguilla?

Support: Yes, Anguilla fully supports concatenated messaging.

Message length rules:

• GSM-7 encoding: 160 characters for single messages, 153 characters per segment for multi-part messages
• UCS-2 encoding: 70 characters for single messages, 67 characters per segment for multi-part messages

Encoding considerations: Anguilla supports both GSM-7 and UCS-2 encodings. Messages using GSM-7 can contain up to 160 characters before splitting, while UCS-2 messages split at 70 characters. Including even a single emoji or special character (like curly quotes) triggers UCS-2 encoding, reducing your character limit from 160 to 70. Multi-part messages use additional bytes for reassembly headers, which reduces the per-segment character count.

Does Anguilla Support MMS Messaging?

Your MMS messages are automatically converted to SMS with an embedded URL link. When you send multimedia content, recipients receive a text message containing a link to view the media content online.

Phone Number Format and Compatibility

Is Number Portability Available in Anguilla?

Number portability information for Anguilla is not publicly documented. Validate numbers before sending and maintain updated contact lists.

Can You Send SMS to Landlines in Anguilla?

Anguilla does not support SMS to landline numbers. When you attempt to send SMS to landline numbers, delivery fails with a 400 response error (code 21614) from SMS APIs, and you will not incur charges.

SMS Compliance and Regulatory Requirements in Anguilla

The Telecommunications Act 2003 governs Anguilla's telecommunications sector, and the Public Utilities Commission (PUC) oversees it. While specific SMS marketing regulations are not extensively detailed, adhere to international best practices and general data protection principles to ensure compliance.

Important: Anguilla does not have dedicated data protection legislation as of 2025. When handling personal data for SMS campaigns, implement privacy safeguards aligned with international standards (GDPR, CCPA) including secure data storage, purpose limitation, and data subject rights.

Regulatory Contact Information:

• Public Utilities Commission of Anguilla
• Phone: +1-264-497-7374
• Email: info@pucanguilla.com
• Website: https://pucanguilla.com

How to Obtain Consent for SMS Marketing in Anguilla

Best Practices for Obtaining Consent:

• Collect explicit opt-in consent before sending any marketing messages
• Maintain clear records of when and how you obtained consent
• Include clear terms and conditions during the opt-in process
• Specify the types of messages recipients will receive
• Document the source and date of consent acquisition

HELP/STOP and Other Commands

• Support standard opt-out keywords: STOP, END, CANCEL, UNSUBSCRIBE, and QUIT
• Implement HELP keyword responses with service information
• Process opt-out requests immediately
• Send confirmation messages for both HELP and STOP requests
• Use English for keyword responses, as it's the primary language in Anguilla

Do Not Call / Do Not Disturb Registries

Anguilla does not maintain a centralized Do Not Call registry. However, you should:

• Maintain your own suppression lists
• Honor opt-out requests immediately
• Keep records of opted-out numbers
• Regularly clean contact lists
• Implement proper opt-out management systems

What Time Zone Is Anguilla In?

Anguilla follows Atlantic Standard Time (AST/UTC-4) year-round without daylight saving time. Best practices for SMS timing include:

• Send messages between 8:00 AM and 8:00 PM local time
• Avoid sending during holidays and weekends unless urgent
• Consider seasonal timing for marketing campaigns
• Respect quiet hours for non-essential messages

What Phone Number Types Work for SMS in Anguilla?

Alphanumeric Sender ID

• Operator network capability: Supported
• Registration requirements: Pre-registration not required
• Sender ID preservation: Yes, sender IDs are preserved as sent

Use alphanumeric sender IDs to display your brand name (up to 11 characters) instead of a phone number, improving message recognition and trust.

Long Codes (10-Digit Phone Numbers)

Domestic vs. International:

• Domestic long codes: Not supported
• International long codes: Fully supported

Additional Information:

• Sender ID preservation: Yes, original sender ID is preserved
• Provisioning time: Immediate for international long codes
• Use cases: Ideal for transactional messages, notifications, and two-factor authentication

Short Codes

• Support: Not supported in Anguilla
• Provisioning time: N/A
• Use cases: N/A

What Content Is Restricted for SMS in Anguilla?

Restricted Content Types:

• Gambling and betting services
• Adult content
• Cryptocurrency promotions
• Unauthorized financial services
• Misleading or fraudulent content

Content Filtering and Spam Prevention

Known Filtering Rules:

• Messages containing certain keywords may be blocked
• Carriers filter URLs from suspicious domains
• High-volume identical messages may be flagged as spam

Best Practices to Avoid Message Blocking:

• Avoid spam trigger words
• Use approved URL shorteners
• Vary message content for bulk sends
• Maintain consistent sending patterns
• Follow carrier guidelines for message throughput

Best Practices for SMS Delivery to Anguilla

Messaging Strategy

• Keep messages under 160 characters when possible to avoid segmentation charges
• Include clear calls to action
• Use personalization tokens thoughtfully
• Maintain consistent brand voice
• Include your business name in messages for transparency

Sending Frequency and Timing

• Limit to 2–4 messages per month per recipient to avoid opt-outs
• Space out campaign sends
• Avoid sending during local holidays
• Monitor engagement metrics to optimize timing

Localization for Anguilla

• Use English as the primary language
• Keep content culturally appropriate
• Consider local context and references
• Use local date and time formats

Opt-Out Management

• Process opt-outs within 24 hours
• Send opt-out confirmation messages
• Maintain accurate opt-out records
• Regularly audit opt-out lists
• Train staff on opt-out procedures

Testing and Monitoring SMS Delivery

• Test messages across both major local carriers (Digicel and FLOW)
• Monitor delivery rates closely
• Track engagement metrics
• Regularly test opt-out functionality
• Monitor for delivery issues or blocks

How to Send SMS to Anguilla: API Integration Guides

Twilio SMS API for Anguilla

Twilio provides a robust SMS API for sending messages to Anguilla. Here's how to implement it:

import { Twilio } from 'twilio';

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

// Function to send SMS to Anguilla
async function sendSMSToAnguilla(
  to: string,
  message: string,
  from: string
): Promise<void&gt; {
  try {
    // Ensure number is in E.164 format for Anguilla (+1264)
    const formattedNumber = to.startsWith('+1264') ? to : `+1264${to}`;
    
    const response = await client.messages.create({
      body: message,
      to: formattedNumber,
      from: from, // Your Twilio number or approved sender ID
    });
    
    console.log(`Message sent successfully! SID: ${response.sid}`);
  } catch (error) {
    console.error('Error sending message:', error);
    throw error;
  }
}

Sinch SMS API for Anguilla

Sinch offers SMS capabilities with straightforward integration:

import { SinchClient } from '@sinch/sdk-core';

// Initialize Sinch client
const sinchClient = new SinchClient({
  projectId: process.env.SINCH_PROJECT_ID,
  keyId: process.env.SINCH_KEY_ID,
  keySecret: process.env.SINCH_KEY_SECRET
});

// Function to send SMS via Sinch
async function sendSinchSMS(
  to: string,
  message: string
): Promise<void&gt; {
  try {
    const response = await sinchClient.sms.batches.send({
      sendSMSRequestBody: {
        to: [to], // Array of recipient numbers
        from: "YourCompany", // Alphanumeric sender ID
        body: message
      }
    });
    
    console.log('Message sent:', response);
  } catch (error) {
    console.error('Sinch SMS error:', error);
    throw error;
  }
}

MessageBird SMS API for Anguilla

MessageBird provides a simple API for SMS sending:

import { MessageBird } from 'messagebird';

// Initialize MessageBird client
const messagebird = MessageBird(process.env.MESSAGEBIRD_API_KEY);

// Function to send SMS via MessageBird
async function sendMessageBirdSMS(
  to: string,
  message: string
): Promise<void&gt; {
  return new Promise((resolve, reject) =&gt; {
    messagebird.messages.create({
      originator: 'YourBrand',
      recipients: [to],
      body: message
    }, (err, response) =&gt; {
      if (err) {
        console.error('MessageBird error:', err);
        reject(err);
      } else {
        console.log('Message sent:', response);
        resolve();
      }
    });
  });
}

Plivo SMS API for Anguilla

Plivo's API integration for Anguilla SMS:

import { Client } from 'plivo';

// Initialize Plivo client
const plivo = new Client(
  process.env.PLIVO_AUTH_ID,
  process.env.PLIVO_AUTH_TOKEN
);

// Function to send SMS via Plivo
async function sendPlivoSMS(
  to: string,
  message: string,
  from: string
): Promise<void&gt; {
  try {
    const response = await plivo.messages.create({
      src: from, // Your Plivo number
      dst: to, // Destination number
      text: message,
    });
    
    console.log('Plivo message sent:', response);
  } catch (error) {
    console.error('Plivo error:', error);
    throw error;
  }
}

API Rate Limits and Throughput

Rate limits vary by provider and phone number type. Below are the typical limits:

Twilio:

• US/Canada long codes: 1 message segment per second (MPS)
• US/Canada toll-free: 3 MPS (contact sales for higher throughput)
• International messages: 10 MPS
• A2P 10DLC campaigns: Varies by campaign trust score
• Short codes: 100 MPS

Sinch:

• Plan-based rate limits (maximum 700 requests per second per IP)
• Each service plan includes specific MPS limits
• Status queries limited to 1 request per second per IP

MessageBird:

• US/Canada virtual numbers: 1 MPS per number, 500 SMS per day per number
• SMPP connections: 50 MPS per server (up to 150 MPS with 3 servers)
• Reporting API: 5 requests per second maximum

Plivo:

• Smart queuing system based on source number type and destination country
• Account-level concurrency limit: 100 simultaneous requests
• Per-number rate limits vary by destination
• Multi-part messages auto-adjusted to maintain compliance

Strategies for Large-Scale Sending:

• Implement queue systems (for example, Redis or RabbitMQ)
• Use batch sending APIs where available
• Implement exponential backoff for retries
• For international traffic, distribute across multiple numbers to increase throughput
• Monitor throughput and adjust sending rates based on queue depth
• Avoid "snowshoeing" (using multiple numbers solely for throughput) when sending to US/Canada

Error Handling and Reporting

• Implement logging for all API responses
• Set up automated alerts for high error rates
• Track delivery receipts (DLRs)
• Monitor message costs and delivery rates
• Implement retry logic for failed messages
• Handle HTTP 429 (Too Many Requests) errors with exponential backoff
• Monitor queue depths to prevent 10-hour queue overflow

Frequently Asked Questions (FAQ)

What is the country code for sending SMS to Anguilla?

The international dialing code for Anguilla is +1264. Format all phone numbers in E.164 format (+1264XXXXXXX) when sending SMS through API providers.

How much does it cost to send SMS to Anguilla?

SMS pricing to Anguilla varies by provider and volume. Contact your SMS API provider (Twilio, Sinch, MessageBird, or Plivo) for current per-message rates to Anguilla. Prices typically range from $0.02 to $0.08 per SMS segment.

What is the maximum SMS character limit in Anguilla?

For GSM-7 encoding, single SMS messages support 160 characters. Messages exceeding this limit are split into segments of 153 characters each. For Unicode/UCS-2 encoding (used when emojis or special characters are included), the limit is 70 characters for single messages and 67 characters per segment.

Which mobile carriers operate in Anguilla?

Anguilla has 2 primary mobile network operators: Digicel (MCC/MNC 365 010) and FLOW (Cable & Wireless) (MCC/MNC 365 840). Both carriers support SMS delivery and operate on GSM/UMTS networks with 4G LTE coverage.

Is SMS marketing legal in Anguilla?

Yes, SMS marketing is legal in Anguilla. However, businesses must follow best practices including obtaining explicit consent before sending marketing messages, providing clear opt-out mechanisms, and honoring unsubscribe requests immediately.

Can I use alphanumeric sender IDs for SMS in Anguilla?

Yes, alphanumeric sender IDs are supported in Anguilla and do not require pre-registration. This allows businesses to display their brand name (up to 11 characters) instead of a phone number as the sender.

What SMS API is best for sending to Anguilla?

All major SMS API providers (Twilio, Sinch, MessageBird, and Plivo) support SMS delivery to Anguilla. The best choice depends on your specific needs, including volume requirements, budget, and existing integrations. Twilio offers the most comprehensive documentation and support.

How long does it take for SMS to be delivered in Anguilla?

SMS delivery to Anguilla typically occurs within seconds to a few minutes under normal network conditions. Delivery times may vary based on network congestion, carrier processing times, and API rate limits.

Do I need a local Anguilla phone number to send SMS?

No, you do not need a local Anguilla phone number to send SMS. International long codes and alphanumeric sender IDs are fully supported and work reliably for SMS delivery to Anguilla.

Are there any restrictions on SMS content in Anguilla?

Yes, content restrictions apply to gambling, adult content, cryptocurrency promotions, unauthorized financial services, and fraudulent or misleading messages. Additionally, carriers may filter messages that contain spam trigger words or suspicious URLs.

Recap and Additional Resources

Key Takeaways:

• Always format numbers in E.164 format (+1264)
• Implement proper error handling and logging
• Monitor delivery rates and costs
• Follow compliance guidelines and opt-out management
• Test thoroughly before sending bulk messages

Next Steps:

1. Review the Telecommunications Act 2003 of Anguilla
2. Set up proper monitoring and logging systems
3. Implement proper opt-out management
4. Test integrations with small volumes first

Additional Information:

• Public Utilities Commission of Anguilla
• Government of Anguilla – Telecommunications
• Telecommunications Act and Regulations (available under Acts & Regulations section)

Technical Resources:

• Twilio API Documentation
• Sinch Developer Portal
• MessageBird Developers
• Plivo API Reference