WhatsApp applies country calling codes and network prefixes to decide which per-minute rate applies for outbound voice calls. This ensures accurate and transparent billing across regions.

📥 DOWNLOAD THE MAPPING FILE

👉 Download country-code-to-rate-mapping.csv
(Updated weekly. Format: Country Code, Network Prefix, Region, Rate Per Minute)

🧭 WHAT’S IN THE FILE?

The CSV contains:

• Country Code → e.g., 91 (India)
• Network Prefix → e.g., 981 (India mobile)
• Region Name → e.g., South Asia – India
• Rate per Minute (USD) → e.g., 0.0075

Example row:
91, 981, South Asia – India, 0.0075

🔎 HOW RATES ARE APPLIED

📌 Longest Prefix Rule: If multiple prefixes match, the most specific (longest) prefix is always used.

🛠️ DEVELOPER USE CASES

You can programmatically:

• Parse the CSV and map rates to numbers in your app
• Run a startsWith(country code + prefix) check to find the correct rate
• Integrate with Session Initiation APIs or internal billing estimators
• Build dashboards to compare expected vs. actual costs

⚠️ LIMITATIONS TO NOTE

• File covers voice call rates only (not SMS or templates)
• Mappings may change weekly — always download the latest CSV
• Carrier overrides or VoIP blocks can cause differences between mapped vs. real-world outcomes

✅ VERIFYING RATES

• Use the mapping file to calculate expected cost per call
• Cross-check with your Meta Business Suite invoice
• If discrepancies arise, open a ticket with WhatsApp Business Support [https://app.getguru.com/card/#]

💡 PRO TIP

Maintain a local cache of the mapping file but refresh it weekly. For critical billing workflows, automate the CSV fetch and validation to avoid relying on stale rate data.