Use an SMS API like Twilio, Sinch, MessageBird, or Plivo. Ensure the recipient's number is in E.164 format (+504) and your message adheres to Honduras's regulations and best practices. Twilio provides a robust SMS API with TypeScript support and handles encoding automatically with the 'datacoding: 'auto'' parameter. Consider factors such as delivery rates and API rate limits when choosing an SMS provider for sending to Honduras.

Honduras has a growing mobile market with widespread SMS usage, particularly crucial for reaching rural areas with limited data connectivity. Major operators like Tigo and Claro dominate the market. While OTT apps are popular in urban areas, SMS remains essential for business communication.

Two-way SMS is not supported through most providers in Honduras. Businesses can send messages, but receiving replies via the same channel isn't possible with standard configurations; alternative methods may be required for two-way communication.

Adhere to Honduras's Central Time Zone (UTC-6) and restrict messaging between 8:00 AM and 8:00 PM local time. Avoid sending during national holidays. Consider business hours for B2B communications and emergency messages can be sent outside these times.

No, sending SMS to landline numbers in Honduras is not supported and will result in delivery failures. Attempts to do so will typically generate a 400 response error (error code 21614) from SMS APIs and will not appear in logs nor incur charges.

Standard SMS length limits apply: 160 characters for GSM-7 encoding and 70 characters for UCS-2 encoding. Messages with special characters automatically use UCS-2, reducing the character limit. Concatenated messages are supported for longer content, but limitations vary based on sender ID type.

Obtain clear, documented opt-in consent before sending marketing messages, including company identification and terms of service. Use double opt-in, record consent details (timestamp, source, IP), and store records securely for at least two years. Refresh consent regularly for long-term subscribers.

Support for STOP, CANCELAR, and AYUDA (Spanish for Help) is mandatory in both English and Spanish. Implement immediate processing of opt-out requests and send confirmation messages in the same language as the request.

Restricted content includes gambling, adult content, cryptocurrency promotions, unauthorized financial services, and political messaging without proper authorization. Avoid URL shorteners, excessive punctuation, and ensure clear sender information to prevent blocking.

Alphanumeric sender IDs are supported but not preserved. They are typically overwritten with a numeric sender ID. No pre-registration is required for alphanumeric sender IDs.

Short codes have limited availability and take 8-12 weeks to provision. They are best suited for high-volume messaging campaigns, two-factor authentication, and customer service communications.

Keep messages concise (under 160 characters), include clear call-to-actions, personalize thoughtfully, and maintain consistent branding. Limit frequency to 3-4 messages per week, respect local holidays, and schedule campaigns during business hours.

Process opt-outs within 24 hours, maintain a centralized opt-out database, regularly clean and validate lists, and include clear opt-out instructions in every message. Honoring opt-out requests within 24 hours is crucial for compliance.

Twilio: 250/second, Sinch: 100/second, MessageBird: 150/second, Plivo: 200/second. For large-scale sending, use queue systems, batch APIs, monitor throughput, and implement exponential backoff for retries.