Honduras Phone Number Format: +504 Country Code & Validation Guide 2025

This comprehensive guide covers everything you need to know about Honduras phone numbers, including the +504 country code, 8-digit number format, validation techniques, and implementation best practices. Whether you're building SMS integrations, validating user input, or developing telecom applications for the Honduran market, you'll find practical code examples and technical specifications.

Honduras Phone Number Quick Reference

• Country: Honduras (HN)
• Country Code: +504
• International Prefix: 00
• National Prefix: None
• Phone Number Length: 8 digits (National Significant Number)
• Format: +504 XXXX XXXX

When to Include the Country Code

• Always use +504 when storing numbers in databases, sending international SMS/calls, building APIs for international use, or displaying numbers to international audiences
• Omit country code when dialing domestically within Honduras or displaying to local Honduran users in local context only
• Best practice: Store with country code (+504) and display based on the user's location context

How Honduras Phone Numbers Work: The 8-Digit System

Honduras uses a standardized 8-digit numbering plan for all phone numbers (both mobile and landline) since 2004. This standardization simplifies number management and portability, contributing to a stable telecommunications environment in Central America. The 8-digit structure applies to both landlines and mobile numbers.

Why standardization matters for developers:

• Simplified validation: Single length (8 digits) reduces validation complexity
• Number portability: Uniform length enables seamless carrier switching without number changes
• Database design: Fixed-length fields improve storage efficiency and indexing performance
• International integration: Consistent format aligns with E.164 standard, simplifying international routing
• Future-proofing: Adequate numbering capacity reduces need for future format changes

Phone Number Format Structure

All Honduras phone numbers follow the international E.164 format:

+504 [8-digit number]

The complete format includes the country code (+504) followed by an 8-digit National Significant Number (NSN).

Format breakdown by phone type:

Cost implications:

• Mobile-to-mobile calls typically cost more than landline calls
• International calls to Honduras incur standard international rates
• Toll-free numbers (8002) are free for callers but incur costs for the receiving business
• SMS costs vary by operator and destination number type

Honduras Phone Number Format History: 7 to 8 Digits

Prior to 2010, Honduras landline numbers used a 7-digit format. A leading "2" was added to all existing 7-digit landline numbers, bringing the total to eight digits and standardizing the length of both landline and mobile numbers. This historical context matters for developers working with legacy systems or databases. [1]

Handling Legacy 7-Digit Numbers

For systems with legacy data:

1. Detection: Identify 7-digit numbers without country code or starting digit
2. Migration: Prepend "2" to 7-digit landline numbers (e.g., 212 3456 → 2212 3456)
3. Validation: Add validation to flag unmigrated legacy numbers
4. User prompts: Prompt users to confirm whether a 7-digit number is a legacy landline

Example migration code (JavaScript):

function migrateLegacyNumber(number) {
  const cleaned = number.replace(/\D/g, '');
  // If 7 digits and doesn't start with 2, it's a legacy landline
  if (cleaned.length === 7 && !cleaned.startsWith('2')) {
    return '+5042' + cleaned;
  }
  // If already 8 digits starting with 504
  if (cleaned.length === 11 && cleaned.startsWith('504')) {
    return '+' + cleaned;
  }
  return number; // Return as-is if already valid
}

Backward compatibility considerations:

• Maintain a flag in your database indicating whether a number has been migrated
• Keep audit logs of number format changes
• Consider a grace period where both formats are accepted with automatic conversion
• Document the migration date for compliance and support purposes

How to Validate Honduras Phone Numbers: Developer Guide

Phone Number Validation Regex

Validating Honduras phone numbers requires checking the +504 country code and 8-digit format. Use these regular expressions:

^\+5042\d{7}$     // Landline
^\+504[3789]\d{7}$ // Mobile
^\+5048002\d{4}$  // Toll-free

Handling different input formats: Users enter numbers in various formats. Handle these input formats:

• International format: +504 9123 4567
• Without plus: 504 9123 4567
• Local format: 9123 4567 (requires country context)
• With parentheses: +504 (912) 34567
• With dashes: +504-9123-4567

This robust validation function in JavaScript returns both validity and number type:

const validateHonduranNumber = (phoneNumber) => {
  // Remove all non-digits
  const cleanNumber = phoneNumber.replace(/\D/g, '');

  // Handle different input formats
  let normalized;
  if (cleanNumber.startsWith('504') && cleanNumber.length === 11) {
    normalized = cleanNumber; // Already in correct format
  } else if (cleanNumber.length === 8) {
    normalized = '504' + cleanNumber; // Add country code
  } else {
    return { isValid: false, type: null, error: 'Invalid length' };
  }

  const patterns = {
    landline: /^5042\d{7}$/,
    mobile: /^504[3789]\d{7}$/,
    tollFree: /^5048002\d{4}$/
  };

  const type = Object.keys(patterns).find(key => patterns[key].test(normalized));

  return {
    isValid: !!type,
    type: type || null,
    normalized: type ? '+' + normalized : null,
    error: type ? null : 'Invalid number format'
  };
};

Common validation pitfalls:

• Not trimming whitespace: Always trim before validation
• Rejecting valid formats: Accept multiple input formats, normalize internally
• Missing country code: Assume +504 for 8-digit numbers when context is Honduras
• Case sensitivity: N/A for phone numbers, but relevant for error messages
• Special characters: Strip all non-digits except leading +

Error handling examples:

function handlePhoneValidation(input, context = {}) {
  try {
    const result = validateHonduranNumber(input);

    if (!result.isValid) {
      // Provide specific error messages
      if (input.replace(/\D/g, '').length < 8) {
        throw new Error('Phone number is too short. Honduras numbers are 8 digits.');
      }
      if (input.replace(/\D/g, '').length > 11) {
        throw new Error('Phone number is too long.');
      }
      throw new Error(result.error || 'Invalid phone number format');
    }

    return result;
  } catch (error) {
    console.error('Validation error:', error.message);
    return { isValid: false, error: error.message };
  }
}

Example unit tests:

// Test cases for Honduran phone validation
const testCases = [
  { input: '+504 2212 3456', expected: { isValid: true, type: 'landline' } },
  { input: '91234567', expected: { isValid: true, type: 'mobile' } },
  { input: '+504 8002 1234', expected: { isValid: true, type: 'tollFree' } },
  { input: '504-9123-4567', expected: { isValid: true, type: 'mobile' } },
  { input: '212 3456', expected: { isValid: false } }, // Legacy 7-digit
  { input: '+504 5123 4567', expected: { isValid: false } }, // Invalid prefix
  { input: '', expected: { isValid: false } },
  { input: '+1 555 1234', expected: { isValid: false } }, // Wrong country
];

testCases.forEach(test => {
  const result = validateHonduranNumber(test.input);
  console.assert(
    result.isValid === test.expected.isValid,
    `Failed for ${test.input}`
  );
});

Best Practices

• Storage: Store numbers in E.164 format (+504XXXXXXXX), removing any formatting characters. This ensures international compatibility and simplifies data processing.
• Display: Present numbers with spacing for readability (+504 XXXX XXXX). Consider local conventions and include the country code in international contexts.
• Input sanitization: Strip all non-numeric characters except leading + before processing
• Validation before storage: Never store unvalidated phone numbers
• Normalization: Convert all numbers to E.164 format immediately upon input
• Use established libraries: Consider libphonenumber for production systems

Security considerations:

• SQL injection prevention: Use parameterized queries when storing phone numbers
• Rate limiting: Implement rate limits on validation endpoints to prevent abuse
• Input length limits: Reject excessively long inputs before processing (max 20 characters)
• No PII logging: Avoid logging full phone numbers in application logs; mask middle digits
• HTTPS only: Transmit phone numbers over encrypted connections only

Privacy best practices:

• Hash or encrypt phone numbers for sensitive applications
• Implement user consent before storing phone numbers
• Provide data deletion capabilities per user request
• Document retention policies for phone number data
• Comply with local Honduras data protection regulations

Performance optimization:

• Cache validated numbers to reduce repeated validation overhead
• Use indexed database columns for phone number lookups
• Pre-compile regex patterns (don't recompile on each validation)
• Consider batch validation for large datasets

Library recommendations:

• JavaScript/Node.js: libphonenumber-js (lighter alternative)
• Python: phonenumbers (Google's library)
• PHP: giggsey/libphonenumber-for-php
• Java: libphonenumber (original implementation)

How to Call Honduras: Dialing Instructions

• Calling within Honduras (domestic): Dial the 8-digit number directly
• Calling Honduras from abroad: Dial +504 followed by the 8-digit local number
• Calling internationally from Honduras: Dial 00 + Country Code + Number (example: 00 1 for USA)

Troubleshooting failed calls:

• "Number not in service": Verify the number is current and hasn't been ported
• Cannot connect internationally: Confirm your plan includes international calling
• Call drops immediately: Verify the country code and number format are correct
• Toll-free not working: Some toll-free numbers only work domestically

Alternative international prefixes:

• Standard prefix: 00
• Plus sign (+): Can replace 00 on most mobile phones (long-press 0)
• Carrier-specific codes: Contact your operator for alternative access codes

Important Numbers

• Emergency: 911 (General), 199 (Police), 195 (Fire Department), 378 (Ambulance)
• Services: 102 (Information), 109 (Directory Assistance)

Note: Customer service numbers vary by operator.

Emergency number handling in validation: Emergency numbers should be handled separately from standard validation:

const EMERGENCY_NUMBERS = ['911', '199', '195', '378'];

function isEmergencyNumber(number) {
  const cleaned = number.replace(/\D/g, '');
  return EMERGENCY_NUMBERS.includes(cleaned);
}

function validateWithEmergencyCheck(number) {
  // Always allow emergency numbers through
  if (isEmergencyNumber(number)) {
    return { isValid: true, type: 'emergency', allowAlways: true };
  }
  // Standard validation for non-emergency
  return validateHonduranNumber(number);
}

Note: Emergency numbers should never be blocked by validation logic, even if they don't match standard format rules.

Honduras Mobile Number Portability (MNP)

Honduras introduced mobile number portability in 2014, enabling users to change carriers while retaining their phone numbers. [2] MNP introduces complexities for developers and businesses.

How portability affects operations:

• Message delivery: SMS routing may require HLR lookups to determine current carrier
• Cost calculations: Ported numbers may have different rate structures
• Network routing: Cannot rely on number prefix alone to determine carrier
• Service provisioning: Must query portability database for accurate carrier information
• Analytics: Historical data by number prefix becomes unreliable post-2014

Technical Implementation

• Database Design: Store number and provider information separately. Include timestamps for porting actions and maintain historical porting records.
• Validation Logic: Verify number format and check against a current provider database. Regularly update your database to reflect ported numbers. Use a number lookup service for real-time validation.

Database schema example:

CREATE TABLE phone_numbers (
  id SERIAL PRIMARY KEY,
  phone_number VARCHAR(15) NOT NULL UNIQUE, -- E.164 format
  original_carrier VARCHAR(50),
  current_carrier VARCHAR(50) NOT NULL,
  last_ported_date TIMESTAMP,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  INDEX idx_phone (phone_number),
  INDEX idx_carrier (current_carrier)
);

CREATE TABLE porting_history (
  id SERIAL PRIMARY KEY,
  phone_number VARCHAR(15) NOT NULL,
  from_carrier VARCHAR(50),
  to_carrier VARCHAR(50),
  ported_at TIMESTAMP NOT NULL,
  FOREIGN KEY (phone_number) REFERENCES phone_numbers(phone_number)
);

Sync frequency and caching:

• Real-time lookup: Query portability database for critical operations (billing, routing)
• Hourly sync: Acceptable for analytics and reporting
• Daily sync: Minimum for customer-facing applications
• Cache duration: 24–48 hours maximum; include cache timestamp
• Fallback strategy: Use last known carrier if lookup service unavailable

Error handling for database lookups:

async function lookupCarrier(phoneNumber, options = {}) {
  const { timeout = 5000, fallbackToCache = true } = options;

  try {
    // Attempt real-time lookup
    const response = await fetch(`https://api.mnp-lookup.hn/carrier/${phoneNumber}`, {
      timeout: timeout
    });

    if (!response.ok) {
      throw new Error(`Lookup failed: ${response.status}`);
    }

    const data = await response.json();

    // Cache the result
    await cacheCarrierInfo(phoneNumber, data, 24 * 60 * 60); // 24h TTL

    return { carrier: data.carrier, cached: false, timestamp: Date.now() };

  } catch (error) {
    console.warn('Carrier lookup failed:', error.message);

    if (fallbackToCache) {
      // Attempt to retrieve from cache
      const cached = await getCachedCarrierInfo(phoneNumber);
      if (cached) {
        return { ...cached, cached: true, stale: true };
      }
    }

    // Ultimate fallback: derive from number prefix (unreliable post-portability)
    return {
      carrier: deriveCarrierFromPrefix(phoneNumber),
      cached: false,
      fallback: true,
      warning: 'Using prefix-based fallback; may be inaccurate due to portability'
    };
  }
}

Number Portability in Honduras

Honduras uses a centralized database managed by SITEL (Superintendencia de Telecomunicaciones) for number portability. Integrate with this database for accurate routing and service provisioning. Key aspects include real-time database access, secure API endpoints, and robust error handling. For more information, consult the official CONATEL (Comisión Nacional de Telecomunicaciones) website. [4]

Note: Direct API access to SITEL's portability database requires operator-level partnerships. Use these alternatives:

• Third-party HLR lookup services (e.g., Twilio Lookup API, Infobip)
• Operator-provided APIs if you have direct carrier relationships
• Periodic data exports from regulatory authority (if available)

Integration considerations:

• Authentication: Most APIs require OAuth 2.0 or API key authentication
• Rate limits: Expect 100–1,000 requests per minute depending on service tier
• Pricing: Typically $0.001–$0.01 per lookup
• Latency: Allow 200–500ms for real-time lookups
• SLA: Look for 99.9%+ uptime guarantees for production use

Honduras Mobile Operators: Tigo, Claro, Hondutel & Digicel

The Honduras telecommunications market consists of four major mobile operators: Tigo, Claro, Hondutel, and Digicel. Each operator has unique technical requirements for integration, including different API protocols and authentication methods.

Approximate market share and coverage (2024):

• Tigo (Millicom): ~40% market share, nationwide coverage, strong in urban areas
• Claro (América Móvil): ~35% market share, extensive rural coverage
• Hondutel: ~15% market share, state-owned, improving infrastructure
• Digicel: ~10% market share, focused on specific regions

Number range allocations by operator (approximate):

• Tigo: +504 9XXX XXXX, +504 8XXX XXXX (some ranges)
• Claro: +504 3XXX XXXX, +504 7XXX XXXX (some ranges)
• Hondutel: +504 8XXX XXXX (some ranges)

Note: Due to portability since 2014, prefixes are no longer reliable carrier indicators.

Operator developer resources:

• Tigo: Contact Tigo Business Solutions for API access; requires business account
• Claro: Developer portal access through Claro Empresas program
• Hondutel: Enterprise integrations handled through direct B2B contracts
• Digicel: API access via regional Digicel Developer Program

Multi-operator integration strategies:

• Unified API approach: Use aggregator services (Twilio, Infobip, Vonage) that handle multiple operators
• Direct integration: Only if sending high volumes (>100K messages/month) to justify integration costs
• Fallback chains: Implement primary + backup operators for reliability
• Load balancing: Distribute traffic across operators to optimize costs and delivery
• Monitoring: Track delivery rates and latency per operator

Additional Considerations

• Consult official regulatory websites (CONATEL, SITEL) for the latest information on telecommunications regulations and numbering plan updates
• Verify numbering plans regularly as they evolve
• Review security requirements before integrating with operator systems

Specific security requirements:

• Authentication: API keys, OAuth 2.0, or mutual TLS for operator integrations
• Encryption: TLS 1.2+ required for all data transmission
• Webhook validation: Verify webhook signatures to prevent spoofing
• IP whitelisting: Many operators require IP address registration
• Audit logging: Maintain detailed logs of all API interactions for compliance

Compliance and data protection:

• Local regulations: Honduras follows Latin American data protection standards
• Consent requirements: Obtain explicit consent before sending marketing messages
• Opt-out mechanisms: Provide clear unsubscribe options for SMS campaigns
• Data retention: Comply with telecom operator data retention policies (typically 6–12 months)
• Cross-border transfers: Document data transfers if processing occurs outside Honduras

Privacy regulations specific to Honduras:

• While Honduras doesn't have comprehensive GDPR-equivalent legislation as of 2024, telecommunications are regulated by CONATEL
• Marketing messages require prior user consent
• Users have right to request data deletion
• Store personal data securely and don't share without consent

Frequently Asked Questions

Q: Can I port a landline number to mobile or vice versa? A: Number portability in Honduras applies only within the same service type (mobile-to-mobile). Check with carriers for current policies.

Q: How long does number porting take in Honduras? A: 2–5 business days, though this varies by operator.

Q: Are there any special numbers I should avoid validating as regular phone numbers? A: Yes, exclude emergency numbers (911, 199, 195, 378) and service codes (102, 109) from standard validation.

Q: What happens if I dial a number that's been disconnected? A: You'll typically hear a recorded message indicating the number is not in service. Update your database accordingly.

Q: Do I need different validation for SMS vs. voice calls? A: The number format is the same, but you can only send SMS to mobile numbers (prefixes 3, 7, 8, 9) – not landlines starting with 2.

Q: How should I handle WhatsApp numbers? A: WhatsApp uses the same E.164 format. Validate as standard mobile numbers, but verify WhatsApp registration separately via WhatsApp Business API.

Glossary

• E.164: International standard for telephone number format, includes country code
• NSN: National Significant Number, the phone number without country code
• MNP: Mobile Number Portability, ability to keep number when switching carriers
• HLR: Home Location Register, database storing subscriber information and current carrier
• CONATEL: Comisión Nacional de Telecomunicaciones, Honduras telecom regulatory body
• SITEL: Superintendencia de Telecomunicaciones, manages portability database
• Toll-free: Numbers starting with 8002, free for callers, paid by recipient
• Landline: Fixed-location phone numbers starting with 2
• Mobile: Cellular phone numbers starting with 3, 7, 8, or 9

Summary

Implementing Honduras phone number validation and integration requires understanding the +504 country code, 8-digit format structure, and mobile number portability considerations. Follow the validation regex patterns, code examples, and best practices in this guide to build robust telecom applications for the Honduran market.

For related formats, see our guides on E.164 phone number formatting and other Central American phone number systems.